22. The members of royal family of England live in ______.

A. the Big Ben B. Buckingham Palace

C. Hyde Park D. British Museum

23. From the passage, we can know that_____.

A. less than 300 different languages are spoken in London

B. the National Gallery is the oldest public museum in the world

C. the Big Ben is a 320-foot-high tower

D. London is the biggest city in Eastern Europe

　　In most parts of the world, many students help their schools make less pollution. They join "environment clubs". In an environment club, people work together to make our environment clean.

　　Here are some things students often do.

　　No-garbage（垃圾） lunches. How much do you throw away after lunch? Environment clubs ask students to bring their lunches in bags that can be used again. Every week they will choose the classes that make the least garbage and report them to the whole school.

　　No-car day. On a no-car day, nobody comes to school in a car. Not the students and not the teachers! Cars give pollution to our air, so remember: walk, jump, bike and run. Use your legs! It's lots of fun.

　　Turn off the water! Did you know that some toilets can waste twenty to forty cubic (立方) meters of water an hour? In a year, it would fill a small river! In environment clubs, students mend those broken toilets. We love our environment. Let's work together to make it clean.

24. After students mend toilets, they save .

A. water in cubic meters B. a small river C. a club D. a toilet

25. From the passage we know the students usually have lunch .