问题

We believe we can _____ a way to solve the problem of pollution in the future.

A:catch up with
B:come up with
C:put off
D:set off;

正确答案是：

同类题型

下列各句中，没有语病的一项是（）

34. The designs of the new tools should be ________ carefully, so that we can pick out the one that suits our work.

What’s this in English—It’s egg.

Every day, Cathy eats___________ apple to keep fit.

If you don’t understand the word, you can ________ in a dictionary.