1 . 根据下列单词的重读音节，选出与其他三个发音不同的一个。

A．concentrate

B．concern

C．confirm

D．communicate

2 . On            side of the street there are some trees.

A．both

B．either

C．every

D．all

3 . —           do millions of online users visit the home page of the government?
—To read the news and search for the information they need.

A．When

B．Where

C．Why

D．What

4 . Martin and his friends didn't eat up all the food they ordered,            they took the rest away.

A．for

B．or

C．so

D．as

5 . With the help of the new technology, you            e-mail your friends by mobile phone.

A．can

B．must

C．need

D．should

6 . I'm sure that stricter rules to control cigarette smoking            very soon.

A．made

B．will make

C．were made

D．will be made

7 . Pudong International Airport is one of            airports in the world.

A．big

B．bigger

C．biggest

D．the biggest