题目内容
句型转换:把下面的句子变为同义句。
Why did Edison open up his own lab.
________ did Edison open up his own lab ________?
答案:what,for
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题目内容
句型转换:把下面的句子变为同义句。
Why did Edison open up his own lab.
________ did Edison open up his own lab ________?