— Sorry, I have to ________ now. It’s time for class. — OK, I’ll call back later. 
#72697
A
hang up
B
hang on
C
hold on
D
hold up
推荐题目
He________an engineer by an oil company in the Middle East.
#64072
A
was employed as
B
employed as
C
was employed for
D
employed
--- Any good way to get there on time ?    ---Only by ________.
#74110
A
speeding up
B
turning up
C
taking up
D
putting up
—I haven’t heard from Henry for a long time.—What do you suppose____ to him?
#71442
A
was happening
B
to happen
C
had happened
D
has happened