(2013·长沙二模)—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：选D 考查情态动词。句意：“新的流感疫苗的研究是具有挑战性而且要求很高的。你认为谁能做这个工作？”“我的学生可以试试吗？”情态动词shall用于第一、三人称的疑问句时，表示请求。