Question

【题目】They have two rooms to live in, but they can’t decide .

A. to choose which one B. choose which one

C. which one to choose D. what to choose

Answer 1

【答案】C

【解析】句意：他们有两个房间可以住，但是他们不能决定选择哪一间。decide后跟疑问词加动词不定式的形式。故排除AB；what表示没有选择范围中选择；which表示有确定的选择范围，在这个范围中选择。这里只在两个房间里选择，有选择范围，所以应该用which，故选C。