A、 about
B、 to
C、 on
D、 for
答案:A
A、 about
B、 to
C、 on
D、 for
答案:A
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
A. there being a chance
B. there to be a chance
C. there be a chance
D. being a chance
A. constructed
B. instituted
C. confirmed
D. given up
A. able to
B. capable to
C. able of
D. capable of
A. running through
B. running after
C. running over
D. running out
A. to have carried out
B. having been carried out
C. to have been carried out
D. to be being carried out