答案与解析：
1．分析文章主题：teach your child Science
2．分析被选项小标题：
A What exactly is science?
B How do you find an explanation?
C What topics do you need?
D How do you answer your child's questions?
E Where does your child study science?
F How do you set up the experiment on salt and water?
3．直接解题：
A What exactly is science?
B How do you find an explanation?
C What topics do you need?
D How do you answer your child's questions?
E Where does your child study science?
F How do you set up the experiment on salt and water?
23 Paragraph 1
答案：D。 （child是段落主题词）
1 It is important to make your child interested in science from an early age. Most young children ask a lot of questions and you should give careful scientific answers. Don't only give facts, but try to give explanations as well.
A What exactly is science?
B How do you find an explanation?
C What topics do you need?
E Where does your child study science?
F How do you set up the experiment on salt and water?
24 Paragraph 2
答案：A。
2 Science is not just knowledge; it is a way of thinking, a method of finding out about the world. （段落主题句）We see something. We try to explain it, and we test our idea by setting up an experiment. One day you come home and find the plant on the table has fallen over. You think it might be the wind from the open window or the cat, so you close the window, but leave the cat in and see what happens (you can also try leaving the window open and shutting the cat out). Of course, you remember there may be a third explanation.
B How do you find an explanation?
C What topics do you need?
E Where does your child study science?
F How do you set up the experiment on salt and water?
25 Paragraph 3
答案； F（water, salt是段落主题词）
3 Ask your child to get a piece of string, some salt, a glass of water and an ice cube (冰块). Tell her to put the ice in the water, and then put one end of the string on the ice, leaving the other end over the side of the glass. Put a little salt on the ice. Wait a minute, and then pull the string; it should be attached to the ice. Ask the child: "what has happened?"
B How do you find an explanation?
C What topics do you need?
E Where does your child study science?
26 Paragraph 4
答案：B（排除法）
4 Probably she won't know. Ask her whether fresh water or salt water freezes into ice first. If you live near the sea and have a cold winter, she should know fresh water freezes first as she will have seen that happen. Show her how to test the idea by half-filling two paper cups with water, adding salt to one. Then put them in the icebox and check every three minutes. Write the results in a table. The conclusion will be that salt changes the behavior of water. 'Thinking about the string, we see the salt turned some of the ice into water. Then the salt went away into the water and the ice froze again leaving the string attached.
A the icebox
B the ice
C scientific answers
D the experiment
E the world
F water
27 When your child asks you questions, you should give her .
答案：C（可直接借助句意判断答案）
1 It is important to make your child interested in science from an early age. Most young children ask a lot of questions and you should give careful scientific answers. Don't only give facts, but try to give explanations as well.
A the icebox
B the ice
D the experiment
E the world
F water
28 We set up experiments to test our ideas about .
答案：E。
1 It is important to make your child interested in science from an early age. Most young children ask a lot of questions and you should give careful scientific answers. Don't only give facts, but try to give explanations as well.
2 Science is not just knowledge; it is a way of thinking, a method of finding out about the world. We see something. We try to explain it, and we test our idea by setting up an experiment. One day you come home and find the plant on the table has fallen over. You think it might be the wind from the open window or the cat, so you close the window, but leave the cat in and see what happens (you can also try leaving the window open and shutting the cat out). Of course, you remember there may be a third explanation.
A the icebox
B the ice
D the experiment
F water
29 In the experiment, one end of the string was attached to .
答案； B。
1 It is important to make your child interested in science from an early age. Most young children ask a lot of questions and you should give careful scientific answers. Don't only give facts, but try to give explanations as well.
2 Science is not just knowledge; it is a way of thinking, a method of finding out about the world. We see something. We try to explain it, and we test our idea by setting up an experiment. One day you come home and find the plant on the table has fallen over. You think it might be the wind from the open window or the cat, so you close the window, but leave the cat in and see what happens (you can also try leaving the window open and shutting the cat out). Of course, you remember there may be a third explanation.
3 Ask your child to get a piece of string, some salt, a glass of water and an ice cube (冰块). Tell her to put the ice in the water, and then put one end of the string on the ice, leaving the other end over the side of the glass. Put a little salt on the ice. Wait a minute, and then pull the string; it should be attached to the ice. Ask the child: "what has happened?"
A the icebox
D the experiment
F water
30 The experiment shows that salt changes the behavior of .
责任编辑：虫虫
