---Wakeup,Tom.Timetorise.---I        asleepwhileIwasrea...

問題詳情：

--- Wake up, Tom. Time to rise.

--- I         asleep while I was reading.

A．should have fallen        B．must have fallen       C．could fall             D．must fall

【回答】

B

知識點：動詞時態與語態

題型：選擇題