It remains________ whether Jim will be fit enough to play in the finals.

There is no doubt _______ my friend is not satisfied with what they have done.

Air is to us _____ water is to fish.

It was only 3 hours      the policeman caught the robber.

It’s time that I ______ home, but I’m enjoying myself, so I will stay here a bit longer.

–Sorry, Professor Smith. I didn’t finish the assignment yesterday.
--Oh, you _____ have done it as yesterday was the deadline.
A. must     B, mustn’t      C, should      D. shouldn’t

In our city, citizens have free _____ to the library, which makes it easy for them to read any book they like.

---They are quiet, aren’t they?
--Yes. They are accustomed ______ at meals.

      the website of the Fire Department in your city, and you will learn a lot about firefighting.

Will you ____ it that my birds are looked after well while I'm away?