问题
选择题
He __________ his aunt’s when he went to Wuhan on business.
A．called on
B．called at
C．dropped in on
D．dropped in
答案
答案：B
词义用法辨析。call on 号召，call at 拜访 drop in on sb拜访drop in 拜访（不及物） 句意为“当他去武汉出差时他顺便拜访了姑姑家。” his aunt’s为处所而C项要搭配人作宾语所以答案为B。