A. laughing
B. to laugh
C. laugh
D. laughs

A. fixing
B. fix
C. to fix
D. B and C

A. to, treat, as
B. that, treat, as
C. that, treating, like
D. to, treat, like

[     ]

A. stop
B. to stop
C. stopping
D. stopped

1. Did you see the accident                  this morning? (happen)
2. You should get a chair                  on. (sit)
3. There are so many children _________ (play) in the park on Sundays.
4. It's hot. You'd better                   both the windows and the doors. (open)
5. It's not easy                fish with your hands only. (catch)
6. Our teacher asked us                  to page 16. (turn)
7. You must                 to the teacher carefully in class. (listen)
8. He felt _________ (worry) about his son at that time.
9. He found a number of people already _________ (work) in the workplace.
10. Many children trust animals because they know how _________ (keep) a secret.

1. I'm going to              (live) in the United States.
2. He              (buy) a red sports car last year.
3. He wants to              (help) the old people.
4. He is going to               (play) football once a week.
5. They              ( have) a terrible time in London last winter vacation.
6. It's eight o'clock now. The students are              (have) a physics class now.

A. make
B. take
C. made

A. do
B. to do
C. does
D. doing

A. stay
B. stays
C. stayed
D. to stay

1. The old man said he would like to thank you. (改为同义句)
    The old man said he ____ ____ thank you.
2. He seems to be honest. (改为同义句)
    _____ _____ _____ he is honest.
3. When does the train leave? I want to know. (改为复合句)
    I want to know ____ the train ____.
4. Did Peter come here yesterday? Li Lei wants to know. (改为复合句)
    Li Lei wants to know ____ Peter ____ here yesterday.
5. How do you like his hobby? (改为同义句)
    _____ do you ____ _____his hobby?