某同学把食盐放在右盘上称量，用了10g砝码和0.5g游码，则食盐的质量为（　　）

A．10.5g

B．10.0g

C．9.5g

D．无法判断

—Hello, Mike.  Long time no see, Where are you?

—Oh, not only my parent but also I __ Wuhan for a month.

A．have gone to

B．have been to

C．has been in

D．have been in