If it rains tomorrow. I............................ my raincoat.

If I have extra pens, I always ....................... them to other students.

If I had known you were going to be here, I wouldn’t ………..

When you go to the bookstore today,................ you buy a notepad for me, please?

If you ......me, I can solve the math problem.

A: Is it John's turn to start the game? B: No, it isn't. It's ----------- --.