killer whales in this area has been falling for several years，but scientists are not sure why.

　　1．What does the underlined word"breeding" in Paragraph 6 mean?

　　A．Singing to others.　　　

　　B．Producing young.

　　C．Caring about the old.

　　D．Hunting for food.

　　解析：选B。词义理解题。由第六段第二句可知，科学家说如果这件事情被阻止的话，世界上鲸的数量将处于危险中，因此推断breeding指的是"繁殖"。

　　2．The passage mainly tells us________．

　　A．the problems of whale watching

　　B．how killer whales communicate with each other

　　C．the reduced population of killer whales caused by whale watching

　　D．hearing problems of the killer whales caused by whale watching

　　解析：选D。主旨大意题。文章讲述了观鲸船的噪音给虎鲸的信息交流造成了麻烦。

　　3．Now in a noisy background，the killer whales have to________．

　　A．sing in a louder voice

　　B．sing longer

　　C．travel in smaller groups

　　D．get nearer to each other

　　解析：选B。细节理解题。由第五段可知，因为受噪音干扰，现在虎鲸"唱"的时间比原来长。

　　4．From the passage，we can feel that the author is________．

　　A．angry B．hopeful

　　C．worried D．disappointed

　　解析：选C。推理判断题。文章介绍观鲸船的噪音给虎鲸的交流造成了困难，而且虎鲸数量在下降，科学家也不明白其中原因，因此显然作者对此感到"担忧"。

　　B

　　Almost everyone likes to eat apples.Apples grow in nearly every part of the world.The United States produces more apples than any other country except France.The states of Washington and New York grow the most apples.Perhaps this is why "New York" is often called "Big Apple" by some people.New York is on the east coast and Washington is on the west near Canada.

Apples are red, yellow or green.They are very popular in the United States.Many_people_like_to_carry_apples_to_work_or_to_school_to_eat_with_their_lunches.Most American people are often too busy or too tired to cook dinner, so they often have their dinners