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China'sicebreakerXuelong 

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問題詳情:

China'sicebreakerXuelong 

China's icebreaker Xuelong  ______  by heavy floes since Friday after rescuing passengers on a Russian vessel stranded in Antarctica.

A. has been trapped                    B. had been trapped

C. has trapped                         D. was trapped

【回答】

A

知識點:現在完成時及其被動式

題型:選擇題

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