We should help our parents do some housework.The main structure of the sentence is _______.
—I think using Wechat every night is a waste of time.—Yes. In fact, there are ______ meaningful things to do.
It’s very dangerous when you drive your car ______ a certain speed.
Though he is a manager of a big company, he makes ______ a rule to have supper with his family every day.
The letter “u” in the word “______” has a different pronunciation from the others.
If you develop a ______ of talking with others in English, you’ll improve your ability in speaking.