4. Why are you sitting here doing nothing? You ... to be working
A) should B) could C) ought D) must
5. You ... wear your best clothes. You'll get them dirty.
A) needn't to B)doesn't have to C)couldn't D) mustn't
6.1... work tomorrow. It is a good opportunity to go to the
country,
A) am allowed B) am not allowed
C) will have D) won't have to
