The teachers have had some problems __________ return the papers to the students.
A.deciding when to
B.deciding when
C.deciding
D.to decide when to

Who is the women taking to Mr. Lee? I don’t recall ______ her around the office.
A.seeing
B.being seen
C.to have seen
D.to see

She can’t stand _________ under such terrible conditions.
A.to work
B.work
C.to be working
D.working

It is no use _________ over spilt milk.
A.crying
B.to be crying
C.
D.cried

It is raining hard this week, but Tom expects ________ with his friends this weekend.
A.going fishing
B.to go to fish
C.to go and fish
D.to go fishing

When my teacher is listening to someone who is speaking English very fast, he nods his head and pretends __________.
A.to be understood
B.understanding
C.understanding it
D.to understand

After the operation, the doctors wouldn’t let him ____________ out of bed for three days.
A.to get
B.getting
C.gets
D.get

She always puts off __________ the dinner dishes until the next morning.
A.to wash
B.washing
C.wash
D.and washes

After Ann got a speeding ticket and had to pay a big fine, she decided __________ over the speed limit on interstate highways.
A.to stop driving
B.to stop to drive
C.stopping driving
D.stopping to drive

Graduate students often spend their weekends _______ data for their research.
A.gather
B.to gathering
C.gathering
D.to gather