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16、I didn’t hear the bell ring. I        asleep.

A．must be                                                     B．must have been

C．should be                                 D．should have been

16、B

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科目：高中英語(yǔ) 來(lái)源： 題型：

I didn’t hear the bell ring. I        asleep.

A．must be                                                     B．must have been

C．should be                                 D．should have been

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科目：高中英語(yǔ) 來(lái)源：高考三人行·英語(yǔ) 題型：014

I didn't hear the bell ring, I ________ asleep.

[　　]

A．must be
B．must have been
C．should be
D．should have been

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