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            • 1．
              This new method of teaching _____ for the time being in our school. It will be carried out all over the city.

              A. is experimenting
              B. is experimented
              C. is being experimented
              D. has been experimented
              难度：较易
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            • 2．
              We can't move in the new house now because it _____.

              A. has been painted
              B. was painted
              C. is being painted
              D. is painted
              难度：较易
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            • 3．
              — What is that noise?
              — Oh, I forgot to tell you that the new machine _____.

              A. was tested
              B. will be tested
              C. has been tested
              D. is being tested
              难度：较易
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