---How are you         with your new classmates? ---We often help each other.

When Peter __________ the car door, he found the key left in his car. So he had to call for help.

 A series of stimulus policies and supportive measures taken by the government ________ to promote change in the economic environment in this area.

This coastal area        a national wildlife reserve last year.

(2013·安徽省芜湖三校一模)A recent study has found that the number of smokers ________ sharply over the past five years.