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        1. It’s four o’clock in the afternoon. The boys __ in the pool.
          A.is swiming B.a(chǎn)re swimingC.a(chǎn)re swimmingD.is swimming
          C
          根據(jù)前文的內(nèi)容. It’s four o’clock in the afternoon,可知答案為C,表示現(xiàn)在進行時。
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