Mr．White to hospital for an examination yesterday but he was too busy to e．
A. should e
B. should have e
C. should be ing
D. should had e
网友回答
A. should e
(答案→)B. should have e
C. should be ing
D. should had e
解析：考查情态动词。should have done本应当做，但实际并没有做。句意：怀特先生昨天本应当来医院检查的，但他太忙了而没有来。