Adam ...................... a book now.

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

I will not go to bed until I ....................... all of my homework assignments.

Mike has been a university student ...... six months now.

Ali hasn't missed a single day of school....................... the start of the year.

When you call the office, you should give your message to anyone .................. answers the phone.