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  • The scientist became convinced that life exists on Mars while___the stone.

    The scientist became convinced that life exists on Mars while___the stone.
    A.studying B.studyed
    英語人氣:817 ℃時(shí)間:2019-08-19 10:05:55
    優(yōu)質(zhì)解答
    A為什么呢?是省略句,把它還原你就明白了The scientist became convinced that life exists on Mars while( he was ) studying the stone.另外,while 后一般用進(jìn)行時(shí)態(tài)
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