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写作教程2 课后题答案提示：页码有部分错误，但答案内容正确。
P2 . PART1
Advantages : It is very convenient . You can make a call whenever and wherever you want to.
It is especially helpful in an emergency .
It saves time .You don't have to search for or await the turn for the public phone.
You can always be reached when you are needed by others.
In an information age ,it can help you to get the information you want in the quickest way.
It may help you to grasp any chance to succeed.
You can play games and surf the net through the phone.
.......
Disadvantages : It is quite expensive
Its radiation is harmful to health
Answering calls in public places such as on a bus is embarrassing
Making or answering calls while driving is
dangerous
You can always be reached by your parents or your boss
It may ring at the moment when you least want it to
You may receive calls from strangers or advertising companies and have to pay for them .
.........
P3. PART2
have become increasingly violent
is more and more important for young people
is the kindest neighbour I have ever known
has a profound effect on our health
P4. 2.too specific
British English is different from American English in spelling
3.This is not a sentence, but a fragment
Different countries have different customs
4.too general,too emotional
The local food is tasteless and greasy
P7. Approach 1: For one thing, they should balance science and non-science courses so that they do not have too many
time-consuming labs.
Approach 2:They should also try to get a mixture between subjects they find fairly easy and those that are difficult for them.
Example 1: For instance,the student who dose well in history but expects to have a terrible time with calculus might plan on taking both in the same semester to balance the work load.
Example 2: The student who dose not plan carefully and takes five tough courses the first term may wind up on scholastic probation.
P11. 4 . Paragraph 1:All invention are either basic inventions or improvement on earlier inventions.
Paragraph 2:There was a serious accident in the chemistry lab yesterday.
Paragraph 3: Nutritional deficiency is a major problem of the elderly.
5. Paragraph 1 : Topic sentence: 第一句无关句：Many people .....to each other. 和And nowadays,....more convenience.
Paragraph 2: T S : 第一句无关句：I didn't st night 和I heard that .... own children.
（1）First of all . (2) secondly (3)By and by (4) In addition
