题目内容：

 

1.After the flood, what’s of prime importance is to stop diseases spreading.

After the flood, what’s of prime importance is to stop ______ ______ of diseases.

2.The situation is very different here, and so are the problems.

The situation is very different here, _______ ________ the problems.

3.He got very hot under the collar when others asked about the accusation of lying.

He got very ______ when asked about the accusation of lying.

4.He couldn’t help smiling when he looked back on the cheerful gathering with his friends.

He couldn’t help smiling when he ______ ______ ______ the cheerful gathering with

his friends.