1.  You  __________  help me you know. I was quite capable of doing it myself.
weren´t going to
didn´t have to
weren´t able to

2.  __________   I help you?
May
Would
Will

3.  You   __________  smoke in here.  It's a non-smoking area.
mustn´t
don´t need to
don´t have to

4.  It´s already 6.30 and she said she would be here by 5.30   She __________ been here an hour ago.
would
should
can

5.  I don´t  __________  be there until 7.30,  so we´ve got time for another beer.
must
ought to
have to

6.  The lights and TV are both on.  They __________ be at home.
must
can
will

7.   I´m afraid I  __________  come to your barbecue.  I´ve got a presentation to give and I must prepare for it.
don´t have to
wouldn´t like to
can´t

8.  __________  I open the window?  It's a bit stuffy in here.
Must
Shall
Ought

9.  __________   you help me with my Maths homework?
May
Shall
Will

10. You really  __________   to give up the heavy smoking and drinking before your health starts to suffer.
may
must
ought