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