You must__at home today.A:stay B:to stay C staying D:be stay

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You must__at home today.A:stay B:to stay C staying D:be stay

A.Stay.
Must是情态动词,
后面直接加动词原形.

a

A

A
must后加动词原形

A
must后跟动词原型

选A，must后接动词原形