—People in Southwest China have never experienced _____ natural disaster. —Exactly.Let's do our bit to help them.
They are living with their parents for the moment because their own house _______.
It was so dark in the cinema that I could hardly ______ my friend.
—Time is limited. I have to finish this tonight.—But it’s midnight now and you should have a sleep ______ much work you have to do.
—Robert is indeed a wise man.—Oh, yes. How often I have regretted ______ his advice!
Occasions are quite rare _______ I have the time to spend a day with my kids.