come to Macao, just walk around and you will still be amazed.

1. What can visitors do at the Macao Tower?

A. Visit a museum

B. Try an extreme sport

C. Enjoy a traditional Japanese dinner

D. Challenge the Guinness World Record for jumping

2. What can we learn from the text?

A. Visitors can do nothing but shopping

B. Portuguese culture has no longer existed in Macao

C. The Macao Tower is the highest tower in the world

D. Visitors can enjoy both eastern and western historical cultures in Macao

3. What is the author's purpose in writing the text?

A. To introduce something attractive in Macao to visitors

B. To encourage people to do sports

C. To advertise coming events

D. To tell about the history of Macao

　　B

　　Bats are impressive creatures. They are known to carry dangerous diseases like SARS without getting sick.

　 So researchers wanted to know: How do bats fight off so many deadly diseases? Learning their secret could help doctors better treat humans who have these diseases, therefore saving millions of lives.

　 The researchers now think that the special immunity (免疫性) to illness that bats have may be connected to their ability to fly.

Bats are the only mammals (哺乳动物) that can truly fly. Flying uses up a lot of energy. The energy burned for flying produces something in the animal called free