阅读下面短文，从每题所给的A、B、C、D四个选项中选出最佳选项。
A
Camping is a fun way to get family and friends together to enjoy the outdoors. Follow these tips to make sure your camping trip is safe and healthy.
Bring safe and healthy food along on your camping trip. Eating some food may increase the risk of developing certain illnesses.
Camping is a great way to get physical activity. Do things such as walking, hiking, biking and swimming to stay active during your camping trip. Be sure to bring protective equipment and take steps to avoid getting hurt during activities. Never hike or swim alone. Watch kids closely.
Some wild animals carry illnesses that are dangerous for people. Avoid touching, feeding and getting near wild animals. Enjoy watching them from a safe place in their natural surroundings.
Mosquitoes and other insects can cause certain illnesses. To help fight the bite, apply （敷） the drug over exposed skin. Be sure to follow directions on the package. Wear long sleeves, pants and light-colored clothing.
Always prepare for the unexpected. Before you leave, check the weather report, learn about safety at your camp location, and tell family and friends your plans. Be sure to bring along a first-aid kit, a map, blankets, batteries, food, water and clothes. Know who to contact at the camp. When you return home, check your sunburn and other problems.
16. What should we know in order to be safe on a camping trip?
A. Avoid walking or hiking. B. Never feed some wild animals.
C. Keep away from any insects. D. Wear some warm clothes.
17. Why does the writer write this text?
A. To show us how to be enjoyable while camping. B. To help us learn how to make friends happy.
C. To let us know what to do before camping. D. To tell us how to be safe while camping.
18. Who are most likely to be interested in the text?
A. People who enjoy watching animals. B. Parents who are good with kids.
C. Students who like to stay outdoors. D. Doctors who are studying illnesses.
