’t think he is fit for the job, ______——Why do you think so

I have been skating _______ nine o’clock.

___ with various research projects, that scientist can’t even find time to visit his parents.

Li Jianrou won China’s first gold medal _________ February 13, 2014 at the 2014 Sochi Winter Olympics in Russia.

Sorry to say it will be years _______ we really have classes here with only 25 students