He is ______ some questions in the teachers'office.A.asking B.ask C.asks

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Heis______somequestionsintheteachers''office.A.askingB.askC.asksHeis______somequestionsintheteachers''

He is ______ some questions in the teachers'office.A.asking B.ask C.asks
He is ______ some questions in the teachers'office.
A.asking B.ask C.asks

He is ______ some questions in the teachers'office.A.asking B.ask C.asks
A.asking
be doing正在进行时,表示动作正在进行