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        1. Don’t make so much noise. The children    an English lesson.
          A. have             B. are having           C. were having
          B
          要求別人不要制造噪音,那么孩子們在做的事應(yīng)該是正在發(fā)生的,用現(xiàn)在進(jìn)行時,結(jié)構(gòu)為is或are+doing,故本題選B。
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