Can you choose the different word

John was so sleepy that he could hardly keep his eyes ______.

_______ I tell the head teacher all that has happened?　-No, you _______! Mr. Xin would be terribly angry.

The rescuing soldiers in the helicopters ______ to land on that area, but failed again.

I was close to being killed the day before yesterday. A truck passed me at ________ I thought was a crazy speed.