问题描述：
一道高中英语问题（十三）
—Who did it _______?Anyone you know?
—Well,it ______ be Mr.Smith,but I'm not sure.I should have asked who was calling,but I didn't.
A.look;might
B.sound;may
C.seem;must
D.appear;should
选B,只要解释第一空就行.
—Who did it _______?Anyone you know?
—Well,it ______ be Mr.Smith,but I'm not sure.I should have asked who was calling,but I didn't.
A.look;might
B.sound;may
C.seem;must
D.appear;should
选B,只要解释第一空就行.
问题解答：
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