(B) 18. The art gallery is only open on Saturdays and Sundays.
(B) In other words
(A) For one thing
(C) 19. A good chef has to keep sampling all kinds of ingredients
(B) in case
(A) as if
, it is closed on weekdays.
(C) Sooner or later
(D) To begin with
he or she can create new recipes.
(D) such that
(C) so that
