Thebiggestproblemformostplants,which
来源:语文精选馆 1.36W
问题详情:
The biggest problem for most plants, which ________just get up and run away when threatened, is that animals like to eat them.
A. shall not B. can't
C. needn't D. mustn't
【回答】
B
知识点:虚拟语气与情态动词
题型:选择题