问题
选择题
Mr．White to hospital for an examination yesterday but he was too busy to come．
A．should come
B．should have come
C．should be coming
D．should had come
答案
答案：B
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。