1. Jack is so helpful that he always does what he can _______( help) others with their lessons.　

10.We’re having a party to celebrate my father’s 　　　(四十)birthday.

9.Zhou Enlai 　　　　(奉献)himself to our country.

8.Both his uncle and his father are car __________(销售员).

7.Look! There’s some rubbish ______ (漂浮) on the lake. We shouldn’t litter about.

6.Brandy was quite ____ (精力充沛的), though he had walked such a long way.

5.After three 　　　　(month) study, the students found English interesting to learn.

(B)根据句意和汉语注释，写出单词的正确形式。

4.It’s difficult for me to make such a __________.(decide)

3.The old man was _______ ill ,so he was sent to the hospital at once. (terrible).

2.We can group ________ into the event if we are over 18. (we)