问题

We believe scientists will ________a way tosolve the problem of air pollution.

A:should
B:put off
C:come up with
D:catch up with

正确答案是：

同类题型

Iran was _____ by the arm because of his bad eyesight. [ ]

I’m not a little tired today after giving the room a thorough cleaning and I have never had ____ today.

What is Mom cooking in the kitchen — Fish, I guess. How nice it _______!

I can’t______what has happened to the vegetables,for they were freshly picked this morning.

22．Somalia pirates, mainly made up of four groups,_______________,Puntland Group, NationalVolunteer Coast Guad, Merkah and Somalia Marine, are currently active in the Somali waters