1 . 他说,他先后两次访问中国,亲眼见证了这个国家的巨大变化。
He says that he has visited China twice and witnessed great changes of this country__________________________ .
He says that he has visited China twice and witnessed great changes of this country
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2 . 他们发现在两天之内完成他们的工作非常困难。
They found it very difficult__________________________ within two days.
They found it very difficult
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