1 . I like getting up very early in summer. The morning air is so good       .

A．to be breathed	B．to breathe
C．breathing	D．being breathed

2 . Robert is said ______ abroad, but I don’t know what country he studied in.

A．to have studied

B．to study

C．to be studying

D．to have been studying

3 . The way that you thought of _____the math problem was greatly creative.

A．solving

B．to solve

C．having solved

D．solved

4 . Helen had to shout ________ above the sound of the music.

A．making herself hear	B．to make herself hear
C．making herself heard	D．to make herself heard

5 . The children talked so loudly at dinner table that I had to struggle________(hear)．(所给词的适当形式填空）

6 . _______ English well, one must have a lot of practice.

A．Speak

B．Speaking

C．To speak

D．Speaks

7 . The family began to________(装饰) the Christmas tree with glass balls and lights a week ago. (根据汉语提示单词拼写)

8 . My mission was________ (relieve) Emma, a Canadian specialist in infectious diseases at the end of her posting.(所给词的适当形式填空)

9 . ---The last one __________________ pays the meal.     
---Agreed!

A．arrived

B．arrives

C．to arrive

D．arriving

10 . I was watching the clock all through the meeting, as I had a train ________ (catch). (所给词的适当形式填空)