问题: 将句子改成被动句……………………急急急急急急急急急急急急急急
Did people invent paper making in Eastern Han Dynast?
_______ paper making _______ in Eastern Han Dynast?
How many cars did the workers in this factory make in 2007?
______ ______ cars ______ ______ by the workers this factory in 2007?
解答:
1.Was，invented
2.How many，were made
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