1 . Two months ago I signed a c________with the firm for repairs.(根据首字母单词拼写)

2 . Not drinking enough water _____ lead to headache and poor physical performance.

A．can

B．must

C．should

D．need

3 . We requested him____________(come) before ten o'clock. (所给词的适当形式填空）

4 . Little Tom felt quite sad as everyone was__________(不相信)about his story. （根据汉语提示填空）

5 . He made a very positive c_____________ to the success of the project.   (根据首字母填空)

6 . Recently, people have begun studying the__________(联系) between the natural world and human beings. （根据汉语提示填空）

7 . Sometimes it is more ___________(方便的) to use ATM machine than to go into bank. （根据汉语提示填空）

8 . We will try to make c________with those students who are in need of books in the mountainous area.(根据首字母提示单词拼写)

9 . The painting comes from his private________(收藏).(根据汉语提示单词拼写)

10 . Some diseases ________ quickly from one person to another.

A．move

B．catch

C．spread

D．expand