she promised she ( )do better work.

问题描述:

she promised she ( )do better work.
A would
B will
C shall
D is going to

would .宾语从句中 ,主句是过去式 ,从句也要用过去式 .主句是现在式时,从句时情况而定,该是什么时态就是什么时态.此举中主句中的谓语动词promised是过去式 ,所以从句也要是过去式,除了would,其他的时态都不对