社会生产关系是指人们在生产资料所有制基础上形成的，并在社会生产过程中发生的（）等关系的总和。

A.生产

B.分配

C.交换

D.消费

E.流通

— How many people died in the earthquake?

— It's hard to say _____ people, I think. [ ]

A. Thousand of

B. Thousands of

C. Two thousands