—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
Last year the factory ______ over six million records.
#78896
A
put forward
B
put down
C
put out
D
put through
You’d better spend your time just on the things you find ______.
#68457
A
worth doing them   
B
worth being done
C
worthy of doing them  
D
worthy of being done