【題目】Ladies and gentlemen, please fasten your seat belts. The plane __________.

A. takes off B. is taking off

C. has taken off D. took off

【答案】B

【解析】句意:女士們,先生們，請系好安全帶，飛機(jī)就要起飛了。表位移或起止的動詞或動詞短語,用現(xiàn)在進(jìn)行時表將來。

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