1 . Still, practical problems remain __________ (solve), such as ensuring the trips are safe as many taxis will be flown without pilots. (所给词的适当形式填空)

2 . Realizing that I was the only girl who was not invited, I grew increasingly upset and disappointed for being left ________.(用适当的词填空)

3 . Black holes________not be seen directly so determining the number of them is a tough task.

A．can

B．should

C．must

D．need

4 . —When do you think you will get home?
—I am not sure. Still I ________ be home by 8 o’clock. If it is later than 8 o’clock, I will call you.

A．must

B．should

C．have to

D．need

5 . The film described how a girl adapted to her new life after she was ________________by an American couple. So she was an ________________daughter.(adopt) (所给词的适当形式填空)

6 . You should have a good rest and exercise more ________ energetic at work.

A．keeps

B．keep

C．to keep

D．kept

7 . ________ ________ ________ (在……基础上) of data transmitted by satellites, scientists have made several ________ (分析) of Qinghai-Tibet Plateau. (根据汉语提示完成句子)

8 . It’s by no means by accident that ________ ________ ________ (大多数) women are employed in the nursing and teaching professions.(根据汉语提示完成句子)

9 . I saw Helen at the party but we didn’t have a chance ________ to each other.

A．talking

B．to talk

C．talk

D．talked

10 . Where is the Language Arts Building?

A．On the right of the bridge.

B．At the end of Centre Walk.

C．Opposite the Physical Education Building.