-----Nowadays, more senior students in the Chinese mainland are applying for admission to universities overseas after graduation.

-----________. But studying abroad may cost more.

A．I hope so

B．That’s the case

C．Not really

D．Sounds reasonable

用硫酸钠溶液检验砂的坚固性，其浸烘循环次数为（）次。

A.3

B.4

C.5

D.6