题目内容：

用所给单词的适当形式填空，每空一词。

1.Public signs can help________________(explain) things and give us useful information.

2.Nobody can work this Maths problem out________________ (easy).

3.During the meeting, we’ll have a________________ (discuss) about the problem.

4.We students shouldn’t speak ________________(polite)to the elderly.

5.His uncle is a ________________ (success) businessman?

6.She________________(borrow)this book for two weeks.

7.We Chinese often greet each other by ________________ (shake) hands.

8.Congratulations! You’re one of the________________ (win) of the English competition.

9.He promised (答应) to do as much as he could________________ (help) protect wetlands.

10.Everyone was attracted by the natural________________(beautiful).