1. Mike _______________ (write) English last night.
2. A policeman _______________ (see) two thieves steal a girl's mobile phone last week.
3. Mr. Wang _______________ (buy) a house in Shanghai in 2010.
4. Mary _______________ (begin) to begin Chinese last year.
5. My brother _______________ (not do) his homework yesterday.
6. I listened but _______________ (hear) nothing.
7. Our teacher usually _______________ (help) us when we were at school.
8. What _______________ he _______________ (do) last night?
9. What _______________ (do) you see three hours ago?
10. My brother usually _______________ (catch) a bus to go to school last month.
11. I _______________ (meet) my old friend a moment ago.
12. There _______________ (be) some beautiful flowers and some water in the vase just now.
13. —  _______________ you _______________ (take) part in the last singing contest?
     — No, I _______________.
14. Yesterday the girl _______________ (show) me a nice skirt. I _______________ (like) it very much.
15. I _______________ (make) a card for my cousin last Christmas.