问题
The world’s population is getting largerand larger, so scientists will have to ______ new ways to solve food problem.
A: catch up with
B:keep up with
C:come up with
D: make up with
B:keep up with
C:come up with
D: make up with
正确答案是：
同类题型
Could you tell me what he said just now?— Sorry, I ______ what was going on outside
Who helped Betty tidy up the bedroom just now—_________. She cleaned it all by herself.
_What did he say on the phone just now_ He suggested that we ______ a good rest.