问题

Whatever we do should _____ the environment.

A: contribute for protecting
B: contribute to protect
C: contribute to protecting
D: contribute in protect

正确答案是：

同类题型

The meeting lasted as long as three hours and I couldn’t ____________ it until 10 p．m..

_________________—Not bad.

e immune system weakens, it loses the ability ________ illnesses

I would rather Ted ____ here early.

Do you play basketball一No, I don’t like it at all.