来源:学生作业帮 编辑:大师作文网作业帮 分类:英语作业 时间:2024/11/11 10:56:44
need做实词和情态动词有什么区别
The students were very glad that they_________their papers last weekend as the teacher was away on vacation.
C.needn't have handed in D.didn't need to hand in
D .
为什么选 C 不行?
选C的话就是虚拟语气了