If there is a lot of work ________, I'm happy to just keep on until it is finished.
#89206
A
to do
B
to be doing
C
done
D
doing
推荐题目
 It’s a difficult skill to master, but ______, it will benefit you for the rest of your life. 
#90000
A
once obtained
B
when to obtain
C
after obtaining
D
while obtaining
 Mr. Read made up his mind to devote all he had to ___ some school for poor children.
#98696
A
set up
B
setting up
C
have set up
D
having set up
When his mother came home, he pretended       sound.
#95833
A
sleeping
B
to sleep
C
to have slept
D
to be sleeping