A、 On
B、 in
C、 at
D、 within
答案:B
A、 On
B、 in
C、 at
D、 within
答案:B
A. upon
B. over
C. above
D. below
A. against
B. for
C. upon
D. to
A. over
B. on
C. at
D. to
A. to
B. at
C. on
D. of
A. about
B. to
C. on
D. for
A. on vacation
B. on hand
C. on duty
D. on guard
A. ordering
B. tidying up
C. arranging
D. clearing away
A. go in for
B. hold on to
C. put up with
D. keep pace with
A. came off
B. came up
C. put on
D. went on
A. install
B. to install
C. to be installed
D. installed