There__________more pollution in the future, cities will be dirty.

If the vest is not yours, it must be ________.

There must be hundreds of people on the coach. It seems hopeless for us to _______! Let’s go home now.

下列各句中，加点的成语使用不恰当的一项是

.Either of you can finsh the job,but what I’m interested in is who is_____.