--The research on the new bird flu virus vaccine is challenging and demanding. Who do you

问题补充：

--The research on the new bird flu virus vaccine is challenging and demanding. Who do you think can do the job?

-- my students have a try?

A. Should

B. Shall

C. Will

D. May

答案：

A. Should

(答案→)B. Shall

C. Will

D. May

解析：此处shall用于一、三人称表示征求对方意见。句意：新的禽流感育苗的研究很富有挑战性。你认为谁能做这项工作？——让我的学生试试好吗？表示征求对方意见，用shall。