It took them         time to finish the challenging task.
#71201
A
a number of
B
a lot
C
a great deal of
D
a good many
推荐题目
I try to ______ a few minutes every day to do some exercises.
#65738
A
set out
B
set off
C
set up
D
set aside
We invited her to dinner but she didn't bother to ________.
#64414
A
turn on 
B
turn away
C
turn up 
D
turn out
Even though the workers were not satisfied, they _____ to the boss finally.
#71320
A
gave up
B
gave in
C
gave out
D
gave away
At the age of eight, he ___     a group of child dancers.
#73717
A
joined in
B
attended
C
took part in
D
joined