1. — What's your plan for the coming holiday? 
    — I ________ (visit) Window of the World in Shenzhen if possible.
2. The disabled mustn't ________ (laugh) at by anybody.
3. The teacher told me I ________ (improve) my English if I tried my best.
4. I was told when I was young that Shanghai ________ (lie) in the east of China.
5. When I dropped in, Mr. Sun ________ just ________ (leave), so we had little time to chat.
6. How unlucky he was ________ (fall) off the bike yesterday!
7. I saw you carelessly ________ (throw) some litter on the ground. You'd better pick it up.
8. Because I ________ (lose) my bicycle, I have to walk to school.
9. ________ both of you ________ (write) down all the questions by the end of the last class?
10. The new model of the mobile phone you look forward to ________ (sell) out yesterday.