— Is Jim coming by train?      —I’m not sure. He _________ drive his car.

If you ________ carry with you the belief that whatever you do is right, it’s none of my business.

 Don't use water to put out the fire if oil catches fire. As is known, oil ________ float on water.

We ________the difficulty together, but why didn’t you tell me?

—Is John coming by train?—He should, but he     not. He likes driving his car, but I’m not quite sure.