Henry always forgets things he has done. Yesterday he forgot__________ and looked for it everywhere. 
#96752
A
to post the letter
B
to have the letter posted
C
to have posted the letter
D
having posted the letter
推荐题目
The research group ____________ 15 members has made great achievements in recent years.
#91591
A
is made up of
B
makes up
C
made up of
D
making up of
He had learnd ___ such things, so he refused ___.
#97753
A
to do, being taught to
B
doing, to be taught to
C
to do, to be taught to
D
doing, being taught to
Be careful when you cross the road in rush hours so as to avoid       by a car.
#90996
A
being knocked down
B
knocking down
C
to be knocked down
D
to knock down