- You must have missed the last train to Guangzhou the other day.- Oh, no, I .A. haven’t B. hadn’t C. don’t D. didn’t 题目和参考答案——青夏教育精英家教网—

题目内容

- You must have missed the last train to Guangzhou the other day.

- Oh, no, I _____.

A. haven’t B. hadn’t C. don’t D. didn’t

【解析】

试题分析：考查对must have done用法的理解。must have missed，是对过去发生事情的推测，也就是所说的事情发生在过去，所以回答用一般过去时即可。而A，B选项易被误选，注意这里的have done 并不单纯地表示已经，现在完成的含义，要与must搭配来理解其真正含义。句意：-前几天你肯定错过了去广州的最后一般火车吧。-哦，不，我没有。故选D。

考点：考查对must have done用法的理解。

练习册系列答案

相关题目

During the teenage years, hormonal (荷尔蒙的) changes lead to physical changes like rapid muscle growth, burst in height, and weight gain in both boys and girls. Take a look at the information and height and weight charts for teens presented in this article if the question “How much should I weigh for my age and height” is bothering you.

Average Height and Weight Charts for Teens

Faster growth in kids usually can be noticed at age 8. Genetic factors also determine the physical growth of a child. So, it is perfectly normal for two kids of the same age to have different weights and heights. The following figures should be used as guidelines only.

	For Boys	For Girls
Age	Height	Weight	Height	Weight
in Years	in Inches	in Pounds	in Inches	in Pounds
12-13	58-62	85-100	60-63	95-105
14-15	63-66	105-125	63-64	105-115
16-17	67-70	130-150	64	115-120
18-20	68-70	150-160	64	125-130

Ideal Body Fat Percentage

Fit men have 14% - 17% body fat.

Fit women have 21% -24% body fat.

Male athletes have 6% -13% body fat.

Female athletes have 14% - 20% body fat.

The ideal body fat percentage varies mainly according to age, sex and the physical activity of the individual. But it is a fact that some female athletes have body fat as low as 10 % and some male athletes had lower than 4% body fat. So, it can be observed that other than the above mentioned factors, genetic factors also influence the body-fat ratio.

Body Mass Index (BMI)

You may use the following formula to calculate your BMI:

As per SI Units (国际单位) : BMI = mass (kg)/[height (meters) ]2

Imperial (英制的) Units 1: BMI = mass (Ib. ) x703/[ height (in. ) ]2

Imperial Units 2: BMI = mass (Ib. ) x 4. 88/[ height (ft) ]2

Following conclusions can be derived from (得到) calculating the BMI:

BMI Calculated	Conclusion
BMI 18.5~25	Normal or ideal weight
BMI > 25	Overweight
BMI < 18. 5	Underweight
BMI < 17. 5	Extremely underweight
BMI = 30 or BMI > 30	Obese(病态肥胖的)
BMI = 40 or BMI > 40	Extremely obese

1.According to the Average Height and Weight Charts for Teens, ____.

A. girls keep on growing taller during the teenage years

B. girls grow faster at the end of teenager years than boys

C. girls grow faster at the beginning of teenager years than boys

D. boys' average weight is always heavier than girls' during the teenage years

2. Which of the following statements about ideal body fat percentage is RIGHT?

A. Fit men have higher body fat percentage than fit women.

B. Male athletes have higher body fat percentage than fit men.

C. Female athletes have lower body fat percentage than male athletes.

D. Male athletes have much lower body fat percentage than female athletes.

3.After calculating the BMI, you can reach the conclusion whether ____.

A. your weight is normal

B. your hormone level is normal

C. your height is right for your age

D. your body fat percentage is ideal

4.If a boy is 1. 5 meters in height and weighs 68 kilograms, then he is ____.

A. normal B. obese

C. extremely obese D. underweight

We should think carefully about ______ Mr. Needham said at the meeting.

A. that B. what C. which D. /

Elephants are able to differentiate between ethnicities(种族) and sexes, and can tell an adult from a child --- all from the sound of a human voice.

This is according to a study in which researchers played voice recordings to wild African elephants.

The animals showed more fear when they heard the voices of adult Masai men.

Livestock-herding Masai people do come into conflict with elephants, and this suggests that animals have adapted to specifically listen for and avoid them.

The study is published in Proceedings of the National Academy of Sciences.

Prof Karen McComb and Dr Graeme Shannon from the University of Sussex led the study. They explained that in previous research they had used similar playback experiments to show that elephants could tell --- from the sound of a lion’s roar --- whether the animal was a female or a more dangerous male.

Prof McComb wanted to find out if the animals used their very sharp sense of hearing to identify a potential danger from humans.

The scientists recorded Masai men, women and children saying, in their own language, “Look, look over there, a group of elephants is coming”.

They also recorded Kamba men saying this phrase.

While cattle-herding Masai people often come across free-ranging elephants, which can result in violent conflict, the Kamba people’s more agricultural lifestyle does not generally bring them into aggressive touch with the animals.

When the team played recordings of these different voices through a hidden loudspeaker, they found that elephant family groups reacted more fearfully in response to the voice of a Masai man, than to a Kamba man’s voice.

And the adult male Masai voices encouraged far more of these defensive reactions than the voices of women or boys.

1.An elephant can tell a man from a woman by sense of ________.

A. touch B. sight C. smell D. hearing

2.How did the researchers get to know the elephants’ special ability of identification?

A. By observing the elephants in the zoo.

B. By playing voice recordings to them.

C. By recording the behaviours of elephants.

D. By communicating with them in a special way.

3.We can learn from the passage that elephants are especially afraid of ________.

A. Masai men B. Masai women

C. Kamba men D. Kamba women

4.What is the best title for the passage?

A. Elephants and human beings

B. Differences between human voices

C. Elephants recognise human voices

D. Elephants conflict with human beings

The soldier rushed into the cave, his right hand ____ a gun and his face ____ with snow.

A. held; covered B. holding ;covering

C. holding; covered D. held; covering

David was very unhappy for ____ to the party which was held in his cousin’s house.

A. having not been invited B. not having invited

C. not having been invited D. having not invited

Teen models are not difficult to find. An online agency features both models young as well as older. Those who are looking for child models to show off their products and make them look better can find what they are looking for by hiring children models from these online modeling agencies. This is less expensive than trying to go through large modeling agencies that often cost thousands of dollars for the client(客户).

Many of those who are selling children’s products and have websites for parents and children are looking for teen models. As a result, there is more of a need for young models to participate in the field of modeling. The best way for clients to hire models that will not end up costing them a fortune is to use an online modeling site. An online modeling site will have portfolios(档案) of models young as well as old. Someone who is looking for teen models can find a variety of different children when they take a look at these sites.

Online teen models usually work for less money than offline models, although they are still paid well enough to make it worth their while to model. Clients who are looking for young models can go on an online modeling agency to look for portfolios of the teens that they will want to use in their advertising campaigns. Parents or guardians must agree to the modeling offers and the agency will act as a go-between for both the teen models as well as the clients who are looking for young models.

Clients can look through portfolios for the young models and get the ones that are right for what they are looking for to advertise for them. It is now affordable for anyone to hire teen models when using an online modeling agency site. Parents of young models can also use these sites to get their teens a chance to get a head start in the world of modeling.

1.What is the main advantage of online modeling agencies?

A. They can help the clients to train teen models in a short time.

B. They can offer teen models that cost clients less money.

C. They can make the products look much better.

D. They can advertise for the clients and cost them less money.

2.To hire teen models, the clients are advised to .

A. find modeling agencies

B. look through newspapers

C. make use of online modeling sites

D. advertise on the Internet

3.According to the author, the agency plays a part of .

A. looking for teen models

B. judging good teen models

C. hiring good teen models

D. working as a middleman

4.The online modeling sites can offer teen models a good chance to .

A. beat the other models

B. become famous in the future

C. make a lot of money for future use

D. have an advantage from the beginning

In the back of the garden, we found the little girl ______ with both hands ______ up with a rope.

A. lying; tied B. lay; tied

C. lying; tying D. laid; tying

When I rushed there, there were so many people __________ outside the booking office that I could figure out that my chances of getting a ticket were slim.

A. waiting B. waited

C. to wait D. who wait

试题分类