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    Getting to other planets or to the moon many problems. a. involve b. involves c. involving d. to involve 【查看更多】

     

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    . Getting to other planets or to the moon _____ many problems.

    A. involve    B. involves    C. involving    D. to involve


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    Getting to other planets or to the moon _____ many problems.

    A.involve　　　 B. involves 　 C. involving　　 D.to involve

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    Getting to other planets or to the moon________many problems.?

    A.involve　　　　B.involves　　　　C.involving　　　　D.to involve?

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    . Getting to other planets or to the moon _____ many problems.

    A．involve

    B．involves

    C．involving

    D．to involve

     

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