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            • 1．
              Every year a flood of farmers arrive in Shenzhen for the money-making jobs they _____ before leaving their hometowns.

              A. promised
              B. were promised
              C. have promised
              D. have been promised
              难度：中等
              解析 收藏 试题篮
            • 2．
              In the last few years thousands of films _____ all over the world.

              A. have produced
              B. have been produced
              C. are producing
              D. are being produced
              难度：中等
              解析 收藏 试题篮
            • 3．
              I like these English songs and they _____ many times on the radio.

              A. taught
              B. have taught
              C. are taught
              D. have been taught
              难度：中等
              解析 收藏 试题篮
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