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  • Unless ____A_____ to answer question,the

    Unless ____A_____ to answer question,the
    Unless ____A_____ to answer question,the students were not supposed to talk in Professor Brown's class.
    A.asked B.being asked C.asking D.having asked
    為什么選A,什么時候用B
    英語人氣:791 ℃時間:2020-02-26 05:21:07
    優(yōu)質解答
    這里用過去分詞表示被動,強調學生們在被問到的時候才可以講話.所以選擇A.選B的話,是用現(xiàn)在分詞表示條件,需要描述學生主動的動作.如:When asking the questions,the students were supposed to talk in Professor Br...
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