We can hardly believe that an intelligent person like Daniel be asking such a silly quest

问题补充：

We can hardly believe that an intelligent person like Daniel be asking such a silly question.

A. should

B. might

C. must

D. could

答案：

(答案→)A. should

B. might

C. must

D. could

解析：句意：我们很难相信象Daniel这样聪明的人竟然会问这里愚蠢的问题。Should“应该，这里表示竟然”，might“可能”，must“必须”，could“能够”，所以选A。