1 . To get up early ______ (be) necessary. (所给词的适当形式填空)

2 . When I try to understand what it ________ (be) that prevents so many Americans from being as happy as one might expect，it seems to me that there are two causes. (所给词的适当形式填空)

3 . With forests destroyed, a mass of fertile soil ________ (be) being washed away each year. (所给词的适当形式填空)

4 . Spending too much time and energy on games __________ (be) harmful to our health and they are not real. (所给词的适当形式填空)

5 . The teacher, as well as all the students _____________ (be) excited about the study tour. (所给词的适当形式填空)

6 . The basketball coach, as well as the players, ________ interviewed after the match for their outstanding performance.

A．were

B．are

C．is

D．was

7 . The last and most difficult to learn ___ Unit 4, dealing with agriculture.

8 . It’s cold today, ______ ? (用适当的词填空)

9 . She is the only one of the students who ________ (be) invited to attend the composition contest.

10 . Whether there is life on the moon ________ (be) an interesting question. （所给词的适当形式填空）