Question

求解： 1.I don't think you two have met before, _____? A.do I B.do you C.have you D.have I

2. ___hard the people are working！A.what B. what a C.how D. how a
求解答 求原因

Answer 1

为你解答。
1、I don't think you two have met before, （C.have you）?
我认为你们两人以前没见过面，对吧？
解释：这题考反意问句。I don't think为否定，所以疑问部分为肯定。陈述部分要以think后的宾语从句为准，主语是you，助动词为have。

2、（C.How） hard the people are working！
这些人工作多努力啊！
解释：这是感叹句。中心词是副词hard，所以感叹词用how。当中心词为名词时要用what。

Answer 2

1,答案是C：have you?
2,答案是C:How hard the people are working!