1 . I quickly lower myself, ducking my head to avoid ________（look） directly into his eyes so he doesn't feel challenge. （所给词的适当形式填空）

3 . People often have trouble________ English.

A．learning

B．to learn

C．learn

D．learned

4 . For the sake of health, however, you might consider________(exercise) regularly. （所给词的适当形式填空）

5 . We had a lot of fun ________ his sixteenth birthday at his home last Friday.

A．to celebrate

B．celebrating

C．celebrated

D．celebrate

6 . The discovery of new evidence led to ________.

A．the thief having caught	B．catch the thief
C．the thief being caught	D．the thief to be caught

7 . Bob is considering ______ (放弃，离职) his well-paid job. He may be crazy! （根据汉语提示单词拼写）

8 . I don’t think I could ever get used to ________（live）in a big city after living in the country. （所给词的适当形式填空）

9 . What about ________（have）a game of chess? (所给词的适当形式填空)

10 . We were required to read through the passage in two minutes, so it meant ________ (ignore) the new words we came across. (所给词的适当形式填空）