The teacher made a request that all the homework ( ) before class.

问题描述:

The teacher made a request that all the homework ( ) before class.
A.should hand in
B.must be handed in
C.were handed in
D.be handed in

D啦.
it is suggested/ requested/ ordered/ insisted ---that
从句仍然要用虚拟+ (should) do
是虚拟语气的一种用法