It was seven o;clock in the morning ____ he came back.It was really at seven o’clock ___ he came back from work this morning.
The number of foreign students _________Chinese Universities_________ rising steadily since 1990.
I really don’t know _________ I had my money stolen.
The teacher asked Jim _______________.
The writer is very popular with young people ____ he has been dead for many years.
My manager told me ____ the same mistake again or I would be fired.