1.she almost knocked me down before she saw me
她在看见我之前差点把我撞倒。
2.I think is in the 1980s.
3. 这句chian is larger than any other country in Asia的country应该是countries.主要是名词复数与单数的区别。
4.the first stair,the second stair.
5.后面的two是一个主体,是he与us two比较,所以用比较级,最高级是三者或三者以上的比较。