1 . We have seen________(mass) changes in recent years. (所给词的适当形式填空)

2 . He was _______ (shame) of cheating in the exam and determined never to do that again. (所给词的适当形式填空)

3 . He ______ (freeze) with terror, totally at a loss what he would do next. (所给词的适当形式填空)

4 . Water is_________（必不可少的）to keep every living thing alive. (根据汉语提示单词拼写)

5 . Studies show that people are more________(可能的) to suffer from back problems if they, always sit before computer screens for long hours. (根据汉语提示单词拼写)

6 . The market has shown ________ (每年的) growth of 20 percent for several years. （根据汉语提示单词拼写）

7 . He was_______ with the long and _______ speech, but he tried not to show it.

A．boring; bored

B．bored; boring

C．boring; boring

D．bored; bored

8 . —Do you think it ___ to argue with them?
—The question is not worthy ___.

A．worth; discussing	B．worthwhile; to be discussed
C．worthy; to discuss	D．worth; to be discussed

9 . His________(humor) closing speech was a welcome addition to the otherwise dull meeting. (所给词的适当形式填空)

10 . This is the ________ (heavy) and most tiring work of all. (所给词的适当形式填空)