公共英语(PETS)二级考试真题
第一节 单项填空
从[A]、[B]、[C]和[D]四个选项中,选出可以填入空白处的最佳选项,并在答题卡1上将该项涂黑.
21. ?DAre we supposed to take off our shoes before we enter?
?DNo, you .
[ A ] shouldn ' t [ B ] needn ' t
[ C ] mustn ' t [ D ] can' t