问题

It’s necessary ____ our environment(环境). —I agree with you.

A:protect（保护）
B:protecting
C:to protect
D:protects

正确答案是：

同类题型

So many young men want to _______ writing. [ ]

Could you please come tothe museum with me this afternoon—Sorry，I ________．I have to take a piano lesson at2 pm．

____ either of your parents come to see you recently?

Being be a great ___when you are looking for a job.

It was great fun to be a volunteer, wasn’t it—— Yes. That’s experience hard to forget.