The research is so designed that once______ nothing can be done to change it.

A. begins 　　　　　

B. having begun

C. beginning 　　　

D. begun

64. You must make an ______________ (apologize) to your teacher for being so rude.

Parents should persuade their children not to smoke.

Parents should ___________ their children __________ __________.

　 阅读下面短文，根据所读内容在表格中的空白处填入恰当的单词。

注意：每个空格只填一个单词。

It is amazing to see how fast and how far the mobile phone has spread. Because it extends a basic human quality—the ability to communicate—there are few aspects of life that it fails to touch.

Teenagers have become the channel through which mobile phones have found their way into the wider society. The young were also the first to see the potential of the text messaging. More than two million text messages were sent around the world alone, and by 2004 this had grown to 8 million!

In Japan, the teenage generation has become known as the thumb tribe, because of the speed and accuracy with which they text.

However, teenagers and text messaging are only part of the mobile story. Historians of technology have noted that the telephone arrived at the exact period when it was needed for the reorganization of great cities and the unification of nations. Never before have so many people been on the move, whether as commuters, or travelers.

Mobile phones encourage and respond to this mobility. In China, which is witnessing vast movements of people, the mobile has become a vital part of life: a way to keep in touch with families back home and also a means of establishing oneself in a new social environment.

Connecting people rather than places, the mobile phone has changed the way people organize their lives. Plans can be made or changed on the spur of the moment (一时兴起)and where organizing in advance used to be made. It is ridiculous to compare a mobile to a body part, but it is something to which people grow attached. Mobiles even change the experience of being alone as they provide countless ways to pass the time.

It is in developing countries that the mobile phone’s influence has been the most immediate. Bangladesh is one of several countries in which mobile phones are used as public village telephones, sometimes powered by solar energy. The mobile has become a political and media tool, too. Text messaging first went about across the world by means of gossip and jokes but now important news and information, and even advertising, are moved around the networks.

1.　　　　　 Times

The old professor gave orders that the experiment 　　　　 before 6.

A. was finished　 B. will finish　 C. be finished　　 D. shall be finished

Towards ___________ morning, _________ heavy snow began to fall.

A. the... a　　　　 B. an... a　　　 C. a...不填　　　　 D. 不填...the

Mr. Wang made up his mind to devote all he could ______his oral English before going abroad. 

A. improve           B. to improve           C. improving           D. to improving

The Barbie doll first appeared at the toy fair in New York in 1959． Its creator was Ruth Handler, an American businesswoman． She and her husband Elliott along with Harold Matt Matson started the toy company Mattel． She based the design of the new doll on a German doll named Bild Lilli and named her after their daughter Barbara．

The first Barbie wore a black and white swimsuit and had her hair in a ponytail（马尾辫）． She looked very grown-up． But any concerns that parents would not want to buy it for little girls were soon proved wrong．

Mattel sold 300,000 Barbie dolls in the first year at a price of three dollars． Today, a fifty-year-old Barbie in good condition might cost more than 27,000 dollars．

Barbie dolls have represented 50 different nationalities and are sold in 150 countries． Mattel says 90% of girls in the United States between the ages of three and ten own at least one Barbie doll． It says girls between the ages of three and six own an average of about 12．

Barbie also faced her share of critics． A well-known example was when women’s education groups objected to a talking Barbie doll that declared, among other things, “Math class is tough!” Mattel agreed to change it． Saudi Arabia has banned Barbie dolls． And a lawmaker in the American state of West Virginia would like to do the same． Last month, he proposed banning sales of Barbie and other dolls that influence girls to put too much importance on physical beauty．

Some people say Barbie is an unhealthy role model for young girls． Robin Gerber disagrees． She wrote a book about Barbie． She points out dolls like scientist Barbie and race car driver Barbie． She says people who criticize Barbie should tell girls the story of the businesswoman who created her． She says Ruth Handler wanted the dolls to help girls think about what they wanted to do with their lives．

1．The first Barbie doll might not be popular among little girls because _______．

A.      her hairstyle was out of fashion

B.      her appearance looked much too mature

C.      her way of dressing was against the tradition

D.      physical beauty wasn’t thought to be important

2． From the passage we know that Mattel ________．

　 A． is one of the world’s largest toy companies

　 B． is the director of an American toy company

　 C． was the woman who originally created Barbie

　 D． was a salesman who was good at selling Barbie dolls

3．Barbie dolls are criticized partly because they make girls ________．

　 A． pay too much attention to their physical beauty

　 B． neglect their schoolwork and inner beauty

　 C． prefer physical beauty to inner beauty

　 D． waste too much time and money on clothes

4．It can be inferred from the last paragraph that in her book Robin Gerber ________．

　 A． shows Barbie dolls have a negative influence on girls

　 B． praises a successful person who sells Barbie dolls

　 C． expresses her own favorable opinion about Barbie

　 D． argues for banning the sales of Barbie dolls

—Mother looks sad. Did you tell her about the terrible accident?

—Yes. I_______.

A. should have told her later　　 B. shouldn’t have told her later

C. mustn’t have told her later　　 D. must have told her later

— I haven't seen Mr. White for weeks.

— What _____ to him?

A. must have happened 　 B. may have happened

C. can have happened 　 D. may happen