I’d like to know _____ Chinese.A．when he began to learn B．when did he begin to_刷题宝

题干

I’d like to know _____ Chinese.

A．when he began to learn

B．when did he begin to learn

C．when did he begin learning

D．for how long he began learning

上一题下一题 0.64难度单项选择更新时间:2014-12-15 10:59:37

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