分四人一組，以“What's cool to teenagers？”為主題，選出四件同學(xué)們認(rèn)為最酷的事。四全小組成員分別就一項(xiàng)展開調(diào)查。統(tǒng)計(jì)全班支持該項(xiàng)的人數(shù)及相應(yīng)的百分比，并請他們說明支持原因。完成調(diào)查后，根據(jù)所得信息，小組成員共同分析該調(diào)查顯示出的問題及其對中學(xué)生的各種影響，最后整理出一份調(diào)查報(bào)告。

注：答卷完成后，根據(jù)解題表現(xiàn)，經(jīng)過討論做出對小組成員表現(xiàn)的評價(jià)，填入下表評價(jià)欄目內(nèi)，得分欄目由老師填寫。

小組成員、分工、評價(jià)表：

Grades（分?jǐn)?shù)，得分） at school are often a top worry for children. If you worry most about grades, ask yourself these questions:
●  Why are grades important? What do grades mean to me?
●  How do I get ready for class? Do I go over my notes even when there isn't a test?
●  Do I have a good place to do my homework?
●  Have I tried different ways of studying?
If your worry is about a fight you had with your friend, you might write down all the things you could do----write a note to him or her, invite him or her to watch a basketball game, say sorry to him or her and so on. Once you have a list of things you could do, you can choose one thing that could get your friend back.
You can ask for help when you're worried. You can find someone to talk to, such as your parents, friends, and teachers.

1. 1.

   What do children often worry most about?

   1. A.
      Their hobbies.
   2. B.
      Their homework.
   3. C.
      Their grades at school.
   4. D.
      A fight with their friends.
2. 2.

   According to the passage, when you're worried, you'd better _______.

   1. A.
      work hard
   2. B.
      ask for help and talk to someone
   3. C.
      get ready for class
   4. D.
      do your homework
3. 3.

   If you're worried about grades, DON'T ask yourself "_______".

   1. A.
      Why are grades important?
   2. B.
      What do grades mean to me?
   3. C.
      How do I get ready for class?
   4. D.
      Why not give up（放棄） my studies?
4. 4.

   If you had a fight with a friend, you could _______.

   1. A.
      invite him or her to watch a game
   2. B.
      put the blame（責(zé)備）on him or her
   3. C.
      try to make new friends
   4. D.
      leave him or her alone
5. 5.

   What does the passage mainly tell us?

   1. A.
      Who is often worried.
   2. B.
      When people are worried.
   3. C.
      How to deal with worries.
   4. D.
      What kinds of worries people have.

減數(shù)分裂時(shí)，等位基因的DNA片段的交換和重組通常發(fā)生在：

1. A.
   偶線期
2. B.
   粗線期
3. C.
   雙線期
4. D.
   終變期