问题
选择题
I didn’t hear the phone. I ________ asleep.
A．must be
B．must have been
C．should be
D．should have been
答案
B。
当时我没不听到电话铃响，那“一定是己经睡着了。
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I didn’t hear the phone. I ________ asleep.
A．must be
B．must have been
C．should be
D．should have been
B。
当时我没不听到电话铃响，那“一定是己经睡着了。