问题

Have you heard of Earth Day — Yes, We have only one Earth. We haveno choice but ________ it.

A: protect
B:protected
C:protecting
D: to protect

正确答案是：

同类题型

Can you write the number eighty-five thousand, six hundred and twenty-six—Yes, it is .

They clapped and shouted_____whenthey saw Yao Ming appear on the playground.

Who is it — your neighbor.

31. It’s two weeks since we _______ the work in Beijing Ren’ai EducationInstitute .

Are you in _____ –Yes , I am.