Some people say the need for cars________by the year 2004.

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问题 Some people say the need for cars________by the year 2004.

选项 A、will have doubled
B、had doubled
C、will be doubling
D、be doubled

答案B

解析句意：一些人说，截至2004年(人们)对汽车的需求己增长两倍。考查时态用法。与。“by the time+过去时间”连用的句子要用过去完成时态，再如：She had left by the time arrived.

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