do you know when the first train _ in China?a:w
do you know when the first train _ in China?a:w
do you know when the first train _ in China?a:was produced B:is produced.c:produced.d:have produced
do you know when the first train _ in China?a:was produced B:is produced.c:produced.d:have produced
英语人气：360 ℃时间：2020-03-26 15:53:48
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选a被动式和过去式
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