My wallet is nowhere to be found. I ______ when I was on the bus.A．must have dropped itB．mA、My wallet is nowhere to be found. I ______ when I was on the bus.B、must have dropped itC、must drop itD、should have dropped itE、ought to have dropped it-易过题库-题库最全的搜题网站

My wallet is nowhere to be found. I ______ when I was on the bus.A．must have dropped itB．m

AMy wallet is nowhere to be found. I ______ when I was on the bus.

Bmust have dropped it

Cmust drop it

Dshould have dropped it

Eought to have dropped it

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