1£®The house belongs to my aunt but she________ (not live) here any more.

2£®This machine ________ (not work)£®It hasn’t worked for years.

3£®If their marketing plans succeed, they________ (increase) their sales by 20 percent.

4£®Population experts predict that most people ________(live) in cities in the near future.

5£®He ________(play) football regularly for many years when he was young.

6£®—Have you known Dr.Jackson for a long time?