问题

In the study of modern science, there are many cases _____ soldiers can teach officers．

A:when
B:who
C:which
D:where

正确答案是：

同类题型

Are the beaches in Dalian beautiful—Sure. They___________ lots of tourists from home and abroad every year.

eather turned out to be very good, _________ was more than we expected.

When shall we have a talk about the design—Any time except 8 to 9 tomorrow morning, when I_____ in my desired company.

下列各句中，加点的成语使用恰当的一句是（）

A quarrel________， which made him________his family.