问题
oned you yesterday morning. A girl answered, butI didn’t recognize the voice.— Oh, it __________ my younger sister. She was in myroom at that moment.
A:must have been
B:should have been
C:could have been
D:may have been
B:should have been
C:could have been
D:may have been
正确答案是：
同类题型
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ghter, _________ all kinds of meat, would notlike to eat any vegetable,which worries me a lot.
What if you come across a situation____________ no one but you are alone on a lonely island?
Johngoesfishing on holiday. He likes staying at home and watching TV.