问题

_is known to us all is that we shoulddo as much as we can __ stop the pollution of the environment

A:to invite
B:inviting
C:having invited
D:to be invited

正确答案是：

同类题型

When shall we start the reconstruction of the historic building? — Not until our program ______ by the authority

The pair of leather boots that I bought last weekend_______ comfortably

_______to give up smoking,he threw away his cigarettes.

their great efforts, our planwell

I’m sorry, but I shouldn’t have been so rude to you— You ＿＿ your temper but that’s OK