It _____ rain today, we _____ see clouds in the sky.
  A) has to / can
  B) must / have to
  C) could / can't
  D) may / can
  E) might / must

  Bicyclists _____ remember to signal when they turn.
   A) mustn't
   B) must
   C) has to

  Tom _____ more for the test yesterday.
  A) can always study
  B) will be able to study
  C) could have studied
  D) always studied

  I looked through this book about 2 hours, but _____ find anything
  interesting.
  A) can't
  B) couldn't
  C) had to
  D) can
  E) hadn't to

  We had an appointment yesterday afternoon but he _____ see me.
  A) might not
  B) cannot
  C) have to
  D) mustn't
  E) wasn't able to

  _____ it been raining, I'd have needed my umbrella.
  A) Should
  B) Would
  C) Might
  D) Had

  _____ you upset?
   A) Do
   B) Are
   C) Have

  George King _____ filter-tipped cigarettes, but now he smokes cigars.
  A) is used to smoking
  B) was used to smoke
  C) is accustomed to smoking
  D) was accustomed to smoking

  _____ he know how to cook well?
   A) Has
   B) Does
   C) Is

  _____ you need my help tomorrow, please call me.
  A) Should
  B) Had
  C) Might
  D) Would