B
①Do you love taking a trip to the beach(海滩)? Going traveling is exciting but safety should always come first. Here are some tips for you to keep yourself safe during the beach trip.
②Stay with your parents. Once there was a little boy playing with water on the beach. He left his parents to look for shells(贝壳) and forgot the time. In the end, he couldn’t find his parents. What a bad thing!
③Be careful with swimming. If you go to the beach for the first time, ask others or search online to make sure it’s OK to swim there before you go swimming in the sea. Don’t swim alone. It is not safe. And when swimming in the sea, you should always wear a life jacket(救生衣).
④Watch out(小心) for things in the water. When something on the beach or in the sea bites(咬) you, you should go to see a doctor at once.
⑤Remember, your life is valuable. While having fun, you should be very careful and always put safety first.
()16. How does the writer support his idea in Paragraph 2?
A. By listing numbers. B. By giving an example.
C. By asking questions. D. By showing a report.
()17. What does the underlined word “it” in Paragraph 3 refer to?
A. Looking for shells. B. Playing with water.
C. Catching fish. D. Swimming alone in the sea.
()18. How many suggestions does the writer give us in the text?
A. 2. B. 3. C. 4. D. 5.
()19. What can we infer(推断) from the text?
A. Parents shouldn’t take their kids to the beach.
B. It’s hard to swim in the sea.
C. You should go home when something hurts you.
D. There may be something dangerous(危险的) in the sea.
()20. What is the structure(结构) of this text?

16.B 17.D 18.B 19.D 20.C