Question

【题目】- I still haven't found my pet dog.
-I'm sorry to hear that. You______ be very sad.
A.can
B.should
C.must
D.will

Answer 1

【答案】C
【解析】句意：——我仍然没有找到我的宠物狗。——听到你那样说我很难过。你一定非常伤心。can可能;should应该;must一定，必须;will将会。根据I still haven't found my pet dog，可知我仍然没有找到我的宠物狗，所以一定感到伤心。must一定，必须;故选C。