问题

We believe scientists will ______ a way to solve the problem of air pollution.

A:come up with
B:catch up with
C:come out
D:come up;

正确答案是：

同类题型

What if our demand for more free time to learn by ourselves is not _________ by the school authority?— Hold on to it until we succeed. [ ]

My brother and I _____ in the same school.

The reason _______ he has resigned is poor health.

Yongchuan is famous _________ its tea.

The famous reporter, who is said to go back to America next month, _____in China for almost twenty years.