Exercise 72.1: In/ on/ at

Fill in the blank with in, on or at.

Example: I'll see you ____ half past four.
Answer: I'll see you at half past four.

1. ____ nine in the morning, you can always expect to hit rush hour traffic.

2. Don't forget to put the coffee on first thing ____ the morning.

3. The meeting was over ____ forty-five minutes.

4. The phones were ringing non-stop here ____ Friday!

5. We always have doughnuts ____ Mondays!

Unit 72