Hasitbeenwarnedthatallthestudentsinthiscollege

问题详情：

Has it been warned that all the students in this college _______ stay at their campus until the H1N1 flu has been controlled?

A．can　　　 B．will          C．may　　　 D．shall

【回答】

D

知识点：情态动词

题型：选择题