— You look tired.— Yes. I ___ non-stop until 8 o’clock this morning.
When he was driving home, he was stopped by the policeman and was _______ of speeding.
I don’t know the reason ______ you were absent from the meeting, but I am sure that someone will tell me the reason ______ you haven’t told me.
We often associate the name of Li Ning ______ gymnastics.
______ the cold, thin air and low oxygen levels also can cause mountain sickness.
China is a wonderful land ______ minerals.