问题
选择题
225. I didn’t hear the phone last night. I _____asleep.
A．must be
B．must have been
C．should be
D．should have been
答案
答案：B
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225. I didn’t hear the phone last night. I _____asleep.
A．must be
B．must have been
C．should be
D．should have been
答案：B