I wish these exercises _____ so difficult.
   A) be
   B) are
   C) were not
   D) are not

  I left the party early _____ I didn't feel well.
  A) because
  B) but
  C) until
  D) so

  It is less expensive for me to take the bus to work, but _____ to take
  my car.
  A) I will
  B) for I will
  C) it is less than
  D) it is faster

  _____ but he must also avoid any evidence of partiality.
  A) If you are a judge, you must be unbiased
  B) A judge must be unbiased.
  C) Not only must a judge be unbiased
  D) Not just be punctual

  Sally didn't buy the red shoes _____ she couldn't afford them.
  A) until
  B) so
  C) because
  D) when

  Which option is correct :
  A) Sally's sister pretty and they are, too.
  B) Sally's pretty and they're, too.
  C) Sally's pretty and they are, too.
  D) Sally's pretty but they are.

  If I _____ you I would call her tonight.
   A) was
   B) were
   C) be
   D) am

  Which of the following is a "compound" conjunction?
   A) so big that
   B) as long as
   C) although

  The word "although" can be used to join a dependent clause to a _____ .
   A) dependent clause
   B) conjunction
   C) main clause

  _____ you are a professional, you shouldn't attempt to clean or adjust the inner optics of your microscope.
   A) Providing
   B) As long as
   C) But for
   D) Unless
   E) Otherwise