The student_his hand to ask the teacher a question.A.have held up B.held upC.hold up D.holding up答案选的是D,为什么"hlod"要用进行时态,

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The student_his hand to ask the teacher a question.A.have held up B.held upC.hold up D.holding up答案选的是D,为什么

The student_his hand to ask the teacher a question.A.have held up B.held upC.hold up D.holding up答案选的是D,为什么"hlod"要用进行时态,
The student_his hand to ask the teacher a question.
A.have held up B.held up
C.hold up D.holding up
答案选的是D,为什么"hlod"要用进行时态,

The student_his hand to ask the teacher a question.A.have held up B.held upC.hold up D.holding up答案选的是D,为什么"hlod"要用进行时态,
是D
是现在分词短语作The student的定语,相当与一个定语从句who is holding up
这句话The student_his hand to ask the teacher a question.还差谓语动词wants或者would like
The student - holding up_his hand wants / would like to ask the teacher a question.

举手[ jǔ shǒu ] raise [ put up ] one