1£®Thousands of foreigners were attracted (attract) to the Shanghai World Expo the day it opened.

2£®I was encouraged to break away from old forms and rules.

3£®I bought some new chairs; the old ones should be thrown away.

4£®If you can't afford to pay cash£¬buy the car on credit.

5£®If it is convenient to you£¬please come up to my office at 5 o'clock.

6£®When I got home£¬I found my wallet stolen (steal)£®

7£®Many children are left behind in the countryside when their parents flood into the cities for jobs.