1.The light is still on. They ___to turn it off when they left
   the room.
   A.must forget
   B.must have forgotten
   C.may forget
   D.could have forgotten
2.She's late, something ___ to her.
   A.may happen
   B.can happen
   C.must happen
   D.must have happened
3.You are wet through. You ___ in the rain.
   A.must come
   B.must have caught
   C.may catch
   D.must have got caught
4.You are late. You ___ here earlier.
   A.should come
   B.ought to come
   C.should have come
   D.ought have come
5.I ___ a talk with her, but I was too busy then.
   A.must have had
   B.should take
   C.should have had
   D.may take
6.Somebody ___ here only this morning.
   A.must be
   B.must have been
   C.can be
   D.should have been
7.I ___ them, but I wasn't able to.
   A.ought to have helped
   B.must have helped
   C.might help
   D.needn't have helped
8.She ___ have stopped her work halfway.
   A.ought to not
   B.ought not to
   C.not ought to
   D.does not ought to
9.Your brother's failed again. You ___ him more help in English.
   A.must have given
   B.ought have given
   C.ought to have given
   D.ought give
10.Tom, you are so lazy! This work ___ hours ago.
   A.should finish
   B.must have finished
   C.should have been finished
   D.might have finished





