Question

i don't think you two have met before

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
求原因

Answer 1

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