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宾语从句把下面两个句子合并为一句Light tlavels faster than sound.my teacher t

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宾语从句
把下面两个句子合并为一句
Light tlavels faster than sound.my teacher told me.
为什么2、3句从句的动词都用过去式?
2.where she park her car.Do you know
3 who knock at the door so loudly.I don't know
1 My teacher told me that light travels faster than sound.
2.Do you know where she parked her car.
3 I don't know who knocked at the door so loudly.