He is a good , he is good at ________.—–So he is .

You should _______ smoking. It’s really bad for your health.

Is Li Lei at school today—No, he is at home _____ he has a bad cold.

.—When shall we go to watch the basketball match in the sports center—Not until the work ___tomorrow.

Many cities in China, _______Beijing, have been deeply affected by dirtier air.