Do you know how much time and effort they devoted________ such a complicated project?  
#94207
A
to complete
B
completed
C
completing
D
to completing
推荐题目
The lecture mainly deals with the trouble young children have _______ right from wrong.
#91248
A
distinguished
B
distinguishing
C
to distinguish
D
to be distinguished
You can hardly imagine the difficulty the woman had _____ her children.
#97318
A
brought up
B
to bring up
C
bringing up
D
to have brought up
—The last one _____ pays the meal.—Agreed!
#90291
A
arrived
B
arrives
C
to arrive
D
arriving