After all the students took their seats，the headmaster________．
A．show up
B．show off
C．showed up
D．showed off
(2013莱芜)You’d better make a good plan________you take a holiday．
A．before
B．during
C．until
D．after
(2014河南)This bus doesn’t go to the train station．I’m afraid you’ll have to________at the library and take the A52．
A．take off
B．put off
C．get off
D．turn off
(2014孝感)—Hurry up．It’s almost time for school．
—Don’t worry．We are sure to be at school________．
A．at times
B．on time
C．all the time
D．by the time
Just before the English class，I suddenly realized that I________my English textbook at home．
A．forgot
B．had forgotten
C．left
D．had left
(2012襄阳)—Why was he late for school yesterday？
—He overslept．By the time he got to the bus stop，the bus________already________．
A．was；leaving
B．has；left
C．would；leave
D．had；left
