Paul,_________do you play basketball after school—Twice a week. It can keep me healthy.

May I put my car here —Sorry,you mustn’t. Look at the sign，it says “_______”.

Last year I applied to Princeton UniversityI ________ they would say yes — but they did, and now here I am

Paul made a nice cage to keep the little sick bird it could fly.

The scientists ________ on the new medicine fortwo years. They will succeed in no time.