21. What we don't like is _____ silence, and almost anything is better than ____ embarrassment of a quiet party and silent guests.
A. a; a B. /; the C. the; an D. the; the
22. A dozen ideas were considered ____ the chief architect decided on the design of the building.
A. because B. before C. whether D. unless
23. Every child has the right to be treated equally, regardless of the circumstances _____ they are born.
A. into which B. at which C. that D. under which
