d man needs at most five hour’s sleepa night ,but he__________ for over seven hours tonight.

He talked about a hero ____ no onehad ever heard.

Please stay here for another night. I hear a storm is —Don’t worry. It’s only 20 minutes’ drive from here.

You’d be exposed to a lot ______ pollution if you moved to a town with pure water and air.

“Is John coming by train？” “He should, but he _____ not. He likes driving his car.”