You look tired. It ... a great party last night!

1.   ?    must be
2.   ?    must have been
3.   ?    can't be
4.   ?    can't have been

It's freezing in here. The heating ... be working properly.

1.   ?    must
2.   ?    can
3.   ?    can't
4.   ?    might

I've read the book you lent me.
What? "The lord of the Rings"? You've only had it for a week. You ... finished it yet.

1.   ?    can't have
2.   ?    must have
3.   ?    can't
4.   ?    must

If you don't catch that train, you ... be late for work.

1.   ?    must
2.   ?    should
3.   ?    have to
4.   ?    will

We didn't have much money when I was growing up. We ... be careful how much we spent.

1.   ?    must have
2.   ?    must
3.   ?    had to
4.   ?    should

He looks like that famous actor, doesn't he?
It isn't very likely it's him but I suppose it ... be.

1.   ?    must
2.   ?    has to
3.   ?    can't
4.   ?    might

Do you think I ... call her then?
Well, that's my advice.

1.   ?    must
2.   ?    should
3.   ?    have to
4.   ?    will

The sky's quite grey today, isn't it?
Yes, I think it ... probably rain later.

1.   ?    will
2.   ?    must
3.   ?    might
4.   ?    should

That was very frightening.
We ... died.

1.   ?    might
2.   ?    might have
3.   ?    must
4.   ?    must have

I can't find my mobile phone.
When did you use it last? It ... where you left it.

1.   ?    must have been
2.   ?    can't be
3.   ?    can't have been
4.   ?    must be

Do you want to know what I think?
Yes, I do.
You ... go for that job.

1.   ?    should
2.   ?    should have
3.   ?    may
4.   ?    may have