Question

Mary, along with her parents ________ Hainan for a week and they will come back soon.

A．have been to	B．has been in
C．have been in	D．has been to

Answer 1

B

试题分析：根据语境可知此句的主语是Mary，是单数，故谓语动词也要用单数形式，故排除A和C。时间状语for a week意思是一周的时间是段时间，故谓语动词必须要用延续性，故选B。
点评：有关主谓一致的知识点要特别注意两点：1.由and或both…and连接两个单数形式的名词词组作主语时，一般谓语动词用复数形式。2.由as well as，together with，besides, like，along with，with but，except，accompanied by，rather than，including连接两个名词作主语，谓语单复数形式应由连接词前的名词而定。