If you want to be a doctor you ... hard for many years.

If I. .......... how a good teacher Mr. Taylor was, I would have enrolled in his class years ago.

Go outside and ...... the gardener some water. He needs a break.

Airplanes usually travel --------------- helicopters.

Mrs. Johnson, ..................... we all have missed so much, is back at the university.

I asked her if she .................... skydiving when she was in Dubai.