She keeps me             for three hours.
[     ]
A. waiting
B. to wait
C. wait
D. to waiting
While I             on the street. I found a little boy             near the park.
[     ]
A. am walking; crying
B. was walking; cry
C. was walking; crying
— Where is Mary?
— She must be in the bedroom. I heard her ______ when I passed two minutes ago.
[     ]
A. singing
B. to sing
C. writing
D. to write
— Mom, I saw Mr Brown            in his garden when I passed by.
— Really? Let's go and give him a hand.
[     ]
A.plant
B.planted
C.planting
D.to plant
改错。
(     ) 1. There is a missed button in the shirt. Can you have it checked?                                             
                               A                                               B           C
(     ) 2. My jeans split at the seams yesterday. It made me really embarrasing.                                    
                            A   B                                                                C 
(     ) 3. The shirt is stained. I'm going to have it dry-clean.                                                               
                                 A                           B           C
(     ) 4. Look at the girl in red over there. It must have been Lily.                                                      
                                  A                              B         C
(     ) 5. Mr. John wasn't at his office yesterday. He might go on business.                                         
                              A                                              B    C
If you are weak _______ a subject, _______ and asking a teacher for advice can help.
[     ]
A. at;  working hard
B. in;  work hard
C. at;  work hard
D. in;  working hard
The scientist tried his best to make his view _______.
[     ]
A. to understand
B. understand
C. understood
D. understanding
Look! There are a lot of children            on the playground.
[     ]
A. play
B. playing
C. to play
D. are playing
—Because of the _____ petrol (汽油) price, fewer and fewer people will choose to own a car, I think.
—I have the same idea as you.
[     ]
A. increased
B. increasing
C. improved
D. improving
Yuan Longping makes a great coutribution to _______ rice. We shoud learn ______ him.
[     ]
A. growing; from
B. grow; about
C. grow; from
D. growing; to
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