— When______ you______ the smart hat?— While my parents were waiting for the plane at the airport.A. did, buy B.do,buy C.were,buying
In the past twelve months, they ___________a hit CD. A. make B. will make C. made D. have made
Stop talking! _________the doctor will get angry.
To make us healthier, the teachers often see us ______ on the playground.
Try to be careful. The ________you read, the fewer mistakes you will make.
-Loud music makes people ________to leave quickly. -_________.