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—We can use QQ to communicate with each other online.

  —Good. Will you you please show me ____________.

  A. which to use B. how to use it C. what to use D. where to use it

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用方框中所給單詞的適當形式填空,使短文完整正確(每個單詞限用一次)。

give    while    past    way    ask

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