You've made some progress. Keep it ().
A、on
B、up
C、off
D、down
第1题:
He cut ______his smoking.
A. in
B. up
C. back
D. down
第2题:
A. down
B. up
C. off
D. in
第3题:
We have kept( )our friendship by writing to each other, so we are true friends.
A. back
B. up
C. off
D. down
第4题:
A.put...away
B.put ...up
C.put...off
D.put...down
第5题:
A.keep…from
B.keep…up
C.stop…to
D.make…from