--I hear that a lot of scientific equipment has been bought

学习时间:2026-10-13 02:07:41 阅读：158

--I hear that a lot of scientific equipment has been bought in our school--How wonderful!Do you know when_____?A it has been bought B had it been bought C it was bought D was it bought 原因?其他三个答案为什么不能选?

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殷勤的灯泡

2026-10-13 02:07:41

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c,社么时候买的,buy是个一次性动词。因为有个when,问的是什么时候买的,就是买这个动作什么时候发生的,所以用一般过去时态,而do you know when 。后面要用陈述句的顺序。

--I hear that a lot of scientific equipment has been bought

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昏睡的萝莉

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