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      We’llhaveapicnicintheparkthisSunday

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      We’llhaveapicnicintheparkthisSunday

       We’ll have a picnic in the park this Sunday ___________ it rains or it is very cold.

       A. since                       B. if                                   C. unless                            D. until

【回答】

C

知识点:连词

题型:选择题

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