---Who

问题详情：

 ---Who ____ it be that hasn’t handed in his composition?

---It ____ be Robinson. He ____ it in yesterday.

A. can, will, should hand               B. can, must, should have handed

C. may, may, can’t have handed     D. will, can, could have handed

【回答】

B

知识点：虚拟语气与情态动词

题型：选择题