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Inthelast20years,seaice intheArcticbecauseofglo...

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問題詳情：

Inthelast20years,seaice intheArcticbecauseofglo...

In the last 20 years, sea ice in the Arctic because of global warming.

A. had decreased

B. decreased

C. has been decreasing

D. is decreasing

【回答】

C

知識點：動詞時態與語態

題型：選擇題

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