— Did you stop             hello to Mrs Smith? 　
— No, I didn't see her when she went past.

[     ]
A. saying　　
B. said　　
C. say　　　
D. to say
He pretends _______ this thing.
[     ]
A. not know
B. not knowing
C. not to know
D. to know not
We must do everything we can _______ waste water from running into rivers.

[     ]

A. keep
B. kept
C. to keep
D. keeping
—Shall we stay at home watching TV tonight?
—No, I'd like ________ and see a movie.
[     ]
A. to go
B. go
C. went
D. going
It's important _______ fish too much food.
[     ]
A. to give
B. giving
C. not to give
D. not give
We stopped             , but heard nothing from the room.
[     ]
A. to listening to
B. to listen to
C. listening
D. to listen
It's not easy for us________ English well.
[     ]
A. study
B. to study
C. studying
D. studies
There is a sick boy lying on the street, the kind man stopped _______ him.
[     ]
A. to helping
B. to help
C. helping
D. and helps
That's a good place _______ football.
[     ]
A. playing
B. to play
C. plays
D. played
The shopkeeper asks me ______ last year's cards. Because there is a discount ______ them.
[     ]
A. to buy, on
B. buy, on
C. buying, in
D. to buy, for
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