题目内容

用所给动词的正确形式填空。
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 ________ (keep) a secret.
1. happen/happening  2. to sit   3. playing    4. open    5. to catch    
6. to turn 7. listen   8. worried    9. working    10. to keep
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