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Some students are ______ in the classroom . ( )
A.sing
B.singing
C.sung
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0.99难度 选择题 更新时间:2020-01-27 09:09:24
答案(点此获取答案解析)
同类题1
We are
Beihai Park. ( )
A.visit
B.visits
C.visiting
同类题2
Danny is
pictures. ( )
A.takes
B.takeing
C.taking
同类题3
The boy is ______. ( )
A.run
B.runing
C.running
同类题4
Look!They are ______under a big tree. ( )
A.sitting
B.sits
C.sit
同类题5
The dog is ______ (come) out of the bag.
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