------You ran into Mr. Li! How did that happen? ------Well, _______ of us was looking where we were going. We came around the corner at the same time.
They live on a busy main road. ______ must be very noisy.
They are good friends. _______ is no wonder that they know each other so well.
Does ________ matter if he can’t finish the job on time?
— I don’t know whether I should go abroadornot, Mum. — I leave _______ to your own judgment whether you should do it.
_______ is well known _______ Hong Kong returned to China on July 1st, 1997.