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

I'm sure you will all enjoy .........in the course Physics 101. The teacher is great.

Which of the following sentences as the CORRECT WORD ORDER?

He worked ...... forty years before he decided to retire.

If George ...... how difficult the exam was going to be, he would have prepared better.

Anna was in the library when Lisa …….