--- The research on the new flu virus vaccine is challenging and demanding. Who do you think can do the job?
--- my students have a try?
A. May
B. Must
C. Will
D. Shall
网友回答
A. May
B. Must
C. Will
(答案→)D. Shall
解析：考查情态动词：shall用于第一、三人称疑问句中表示说话人征求对方意见或向对方请示如：Shall he have a try?他可以试一下吗？句意：--新禽流感病毒疫苗是很有挑战性很难的。你认为谁可以做这个工作？--我的学生可以试一下吗？选D。