21．John had made up his mind to give it up, but on _________ second thought he determined to have __________ third try.
A. / ; / B. a; a
C. the; a D. / ; a
22. The teacher always tries his best to create an atmosphere in class ______ his students can practice their speaking skills.
A . for which B . which
C . where D. of which
23．My chest _______ when I make a deep breath, doctor.
A. harms B. hurts
C. wounds D. injures
24. It suddenly occurred to Anne that money couldn't ____ all that Bob had suffered in the past five years.
A．look up to B．put up with
C．fit in with D．make up for
25．In Pakistan, marrying without parental approval can mean ____________ from one’s family.
A. being completely cut up B. to be completely cut off
C. to be completely cut up D. being completely cut off
