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17、---Congratulations on winning the first place in the relay race yesterday!

---Thanks.We        for it for a whole month.

A.were preparing                                         B.had been preparing

C.have been preparing                                   D.would be preparing

17、B

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---Congratulations on winning the first place in the relay race yesterday!

---Thanks.We        for it for a whole month.

A.were preparing                                         B.had been preparing

C.have been preparing                                   D.would be preparing

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