Open the door!Someone is knocking at it.It _____ Mr Zhang.He said he would come here to .

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Openthedoor!Someoneisknockingatit.It_____MrZhang.Hesaidhewouldcomehereto.Openthedoor!Someoneisknocki

Open the door!Someone is knocking at it.It _____ Mr Zhang.He said he would come here to .
Open the door!Someone is knocking at it.It _____ Mr Zhang.He said he would come here to .

Open the door!Someone is knocking at it.It _____ Mr Zhang.He said he would come here to .
must be 表肯定猜测用must,表可能用could be

must be 一定是张先生

must be 可能性很大

bu