【B10】
A. to give
B. giving
C. to be giving
D. have given
Though adults breathe twelve times a minute, breathing is so automatic ______ the average
A. and
B. that
C. for which
D. in fact
【B9】
A. in which
B. on which
C. to which
D. for which
【B4】
A. some
B. others
C. another
D. ones