根据短文内容，从短文后的选项中选出能填入空白处的最佳选项。选项中有两项为多余选项。
It’s summertime-time once again for mosquitoes to make their appearance. And once they appear, mosquitoes are a total pain. They land on you,  bite you, suck out some blood and leave behind an itchy welt（发痒的红肿）.
  1  Female mosquitoes must find blood in order to reproduce, so mosquitoes come equipped with finely tuned sensors to help them locate the blood they need.
Mosquitoes’ weapons
Mosquitoes have perfected three different types of sensors. First, mosquitoes can sense several different chemicals. Mosquitoes can smell carbon dioxide and lactic acid（乳酸）up to 100 feet away.   2 
Second, mosquitoes have very good eyesight. If you are wearing clothing that contrasts with the background, and if you move while wearing that clothing, mosquitoes can see you. It’s a good bet that anything moving is alive, and therefore full of blood.
Finally, mosquitoes come equipped with temperature sensors, so they can find warm-blood mammals and birds very easily.
  3  The female mosquito sticks her proboscis（喙）into you. She sucks about five microliters of your blood into her abdomen.
After she has bitten you, some saliva（唾液）remains in the wound.   4  The area swells and you tich. Eventually, the selling goes away, but the itch remains until your immune cells break down the saliva proteins.
Our defense methods
Because mosquitoes are both a nuisance（讨厌的东西） and a danger, people prefer to stay away from mosquitoes. One way to do that is to use a chemical called DEET, which seems to black a mosquito’s chemical sensors.   5  In some cities there are even trucks that drive around town to spray for mosquitoes. Finally there are to traps. The most popular traps turn propane（丙烷） into carbon dioxide and warmth to attract mosquitoes. Over time, by catching large numbers of mosquitoes, these traps can cause the collapse of the mosquito population in the area.

根据短文内容，从短文后的选项中选出能填入空白处的最佳选项。选项中有两项为多余选项。

It’s summertime-time once again for mosquitoes to make their appearance. And once they appear, mosquitoes are a total pain. They land on you,  bite you, suck out some blood and leave behind an itchy welt（发痒的红肿）.

  1  Female mosquitoes must find blood in order to reproduce, so mosquitoes come equipped with finely tuned sensors to help them locate the blood they need.

Mosquitoes’ weapons

Mosquitoes have perfected three different types of sensors. First, mosquitoes can sense several different chemicals. Mosquitoes can smell carbon dioxide and lactic acid（乳酸）up to 100 feet away.   2 

Second, mosquitoes have very good eyesight. If you are wearing clothing that contrasts with the background, and if you move while wearing that clothing, mosquitoes can see you. It’s a good bet that anything moving is alive, and therefore full of blood.

Finally, mosquitoes come equipped with temperature sensors, so they can find warm-blood mammals and birds very easily.

  3  The female mosquito sticks her proboscis（喙）into you. She sucks about five microliters of your blood into her abdomen.

After she has bitten you, some saliva（唾液）remains in the wound.   4  The area swells and you tich. Eventually, the selling goes away, but the itch remains until your immune cells break down the saliva proteins.

Our defense methods

Because mosquitoes are both a nuisance（讨厌的东西） and a danger, people prefer to stay away from mosquitoes. One way to do that is to use a chemical called DEET, which seems to black a mosquito’s chemical sensors.   5  In some cities there are even trucks that drive around town to spray for mosquitoes. Finally there are to traps. The most popular traps turn propane（丙烷） into carbon dioxide and warmth to attract mosquitoes. Over time, by catching large numbers of mosquitoes, these traps can cause the collapse of the mosquito population in the area.

A．Another way to control mosquitoes is with insecticides（杀虫剂） that kill them.

B．How mosquitoes work is unknown to most of us.

C．Once a mosquito lands on you, it is time to bite.

D．Some bites of mosquitoes are more serious than you thought.

E. Mammals and birds give off these gases as part of their normal breathing.

F. The proteins from the saliva create an immune response from your body.

G. But if you ignore the fact that mosquitoes are so annoying they really are amazing.

　　Shakespeare said that“Some are born great, some achieve greatness, and some have greatness thrust upon them.”So it is with leadership. Some men are born with a capacity for leadership. Some acquire that art by watching and studying the actions of those around them. Other persons find themselves thrown into unusual situations which require them to draw on resources they never realized they had, and events bring out marked leadership. Most of us are never put to such tests. Most of us are not born leaders.

　　We often hear people say,“He's a great guy to work for.”We see workers go out of their way to do things for certain supervisors（管理人）. We see them carry out instructions cheerfully and well or even add something to the doing of the job which was unexpected. In other words, they put themselves into the job and give it that“plus effort” which people give only when they feel that they are part of the team, that they are making a contribution to its success, and that their contributions are understood and appreciated.

　　Now this is not something which just happens. It is built on a one-to-one relationship. It is reflection of the person's attitude toward the job, the supervisor, and the company. Where it exists, it has been developed over a period, appreciates their efforts, and tries to give them all a fair deal.

(1) At the beginning of the passage, Shakespeare's words are quoted（引用）________.

[　　]

A．to make readers appreciate the writer's style

B．to help describe different kinds of leaders

C．to stress the importance of good leadership

D．to slow the writer's appreciation of Shakespeare's ideas

(2) The sentence“Most of us are never put to such tests.”means that“________”.

[　　]

A．most of us are not born leaders

B．tests of leadership ability are necessary to most of us

C．most of us just don't have the opportunity to show leadership ability

D．most of us are not interested in being leaders

(3) Workers are willing to do more than they are told to when ________.

[　　]

A．they are determined to achieve great successes

B．they want to be promoted（提升）

C．they are faced with challenging tasks

D．they have an understanding supervisor

　　Shakespeare said that“Some are born great, some achieve greatness, and some have greatness thrust upon them.”So it is with leadership. Some men are born with a capacity for leadership. Some acquire that art by watching and studying the actions of those around them. Other persons find themselves thrown into unusual situations which require them to draw on resources they never realized they had, and events bring out marked leadership. Most of us are never put to such tests. Most of us are not born leaders.

　　We often hear people say,“He's a great guy to work for.”We see workers go out of their way to do things for certain supervisors（管理人）. We see them carry out instructions cheerfully and well or even add something to the doing of the job which was unexpected. In other words, they put themselves into the job and give it that“plus effort” which people give only when they feel that they are part of the team, that they are making a contribution to its success, and that their contributions are understood and appreciated.

　　Now this is not something which just happens. It is built on a one-to-one relationship. It is reflection of the person's attitude toward the job, the supervisor, and the company. Where it exists, it has been developed over a period, appreciates their efforts, and tries to give them all a fair deal.

(1) At the beginning of the passage, Shakespeare's words are quoted（引用）________.

[　　]

A．to make readers appreciate the writer's style

B．to help describe different kinds of leaders

C．to stress the importance of good leadership

D．to slow the writer's appreciation of Shakespeare's ideas

(2) The sentence“Most of us are never put to such tests.”means that“________”.

[　　]

A．most of us are not born leaders

B．tests of leadership ability are necessary to most of us

C．most of us just don't have the opportunity to show leadership ability

D．most of us are not interested in being leaders

(3) Workers are willing to do more than they are told to when ________.

[　　]

A．they are determined to achieve great successes

B．they want to be promoted（提升）

C．they are faced with challenging tasks

D．they have an understanding supervisor

In Europe people hold the fork in the left hand and the knife in the right throughout the meal, a system that is generally agreed to be more efficient than the American zigzag（曲折的）method. Americans hold both the fork and the knife in their right hands throughout the meal, so they continually change their forks to the left hand when they have to cut their meat. It seems to be funny for the Europeans to see Americans busy changing their dinner sets, making a lot of noises. A few explanations for this American style are as follows:?

(1)Americans are practical and efficient. Since most of us are right-handed, it is reasonable to keep our working tools at all times in the right hand that can use them most efficiently.?

(2)Americans, the master of the New World are rebels（叛逆者）.They use the zigzag method to break the rules in the Old World and in this way they are thumbing their nose at Mother England. Americans are a restless kind. They do not like to sit in one spot for very long when dining.

(3)Forced to do so, they respond by “playing” with the silver.?

Whatever the reason for the practice, it is now certainly as American as apple pie. Europeans recognize this and are quick to attack it as evidence of American innocence（无知）of form. Arguments against the zigzag method rest not only on grounds of efficiency but also on those of tradition. In Old World dining, the knife is held in the right hand continually because it can serve as an instant defense against the uninvited intruders（入侵者）.However, such alertness（警觉） is out of place in the New World, as every American believes that this is the home of the brave. Americans juggle their silverware, perhaps, to show that they are not afraid and that one of them holding a fork is worth any number of them holding blades（刀）.?

Americans use _______ to hold their fork to pick up the salad.?

A. the right hand    B. the left hand?

C. both hands  D. either of the two hands?

As the masters of the New World, Americans use a different cutting method from that in the Old World to _______.?

A. show their independence of Mother England?

B. show their disrespect to Mother England?

C. add a new tradition to those in Mother England?

D. show off their creativeness to Mother England?

In the sentence, the word “juggle” probably means _______.?

A. hold   B. play with

C. pick up      D. lay down?

Also in the last sentence, the two “them” refer to _______.?

A. Americans   B. Europeans?

C. Americans and Europeans separately

D. Europeans and Americans separately?