—What do the letters “DOS” ______？—Disk Operating System.
#82511
A
call for
B
stand for
C
head for
D
care for
推荐题目
Everybody thoutht __ strange for a shy nab to ___ so many exciting things.
#80503
A
this; have done
B
; have done
C
this; do
D
it, do
—You seem familiar with Mr. John?—Sure, we ______ together for three years in the 1990s.
#65767
A
have worked
B
had worked
C
are working
D
worked
He can’t______ what has happened to the wheat, for it was very dried this winter.
#83886
A
look out
B
figure out
C
work out
D
take out
You may use the room as you like,______ you clean it up afterwards.
#67355
A
as though
B
so long as
C
now that
D
as far as
If our time is usefully employed, it will _____ some useful and important products．
#68525
A
turn out
B
refer to
C
look up
D
carry on