Everyone knows that exercise is important. We all need to exercise. There are many ways to exercise. You can walk, run, swim, skate, or play ball games, but you should remember to exercise in the right ways.

        ①    Before you do any exercise, make sure to warm up for at least five minutes. During warming up, you should extend all parts of your body.

        ②      It's best to exercise twice each week. Thirty minutes each time is enough. Try all kinds of things until you find one, two or even three sports that feel right for you.

        ③    There are a lot of equipments (设备) at fitness centers. The equipments will help exercise your arms, legs and other parts of your body to make you fit. Some people buy equipments for their homes. But it is very expensive.

        ④     If you get hurt when you are doing exercise, don't play again until you are well.

⑴Where are you?____                                                         A. I'm talking to my friend.

⑵Excuse me. Where is the supermarket, please?____        B. I'm behind the tree.

⑶Thank you.____                                                                C. Turn left.

⑷Where is the train?  ____                                                  D. It's at the station.

⑸What are you doing?____                                                E. You are welcome.

萝卜贮存时间长了会空心，是因为存放期间（　　）

香港人多地狭，扩展城市建设用地往往采用“上天”、“下海”的方式。对这两种方式的理解，正确的是（   ）
①造高层建筑   ②居住在船上   
③向月球移民   ④填海造地