(   ) 1. Everybody should save water. It’s our ______.

A. duty                  B. pleasure                   C. fun                   D. habit

(   ) 2. —Hello, Wendy. Where are you going?

—I’m going to Yunnan for my holiday.

—Have a good time and enjoy______.

A. ourselves           B. itself                        C. yourself            D. yourselves

(   ) 3. You’d better open the window and let the fresh air ______.

A. in                            B. out                          C. out of               D. into