1. Here are the results. (P. 13)
here和there置于句首，谓语动词是be动词或者come, go等不及物动词时，主语为名词时，用倒装结构，即主谓调换位置，若主语是代词时，主谓不倒装。
Here comes the bus. There he goes.
2. We found that only fifteen percent of our students exercise every day. (P. 13)
percent表示“百分之……”，常用“基数词+percent+of+名词”，“percent of+名词”作主语时，谓语动词的单复数取决于名词的单复数。
Seventy percent of the boys like playing computer games. Ninety of the work is finished.
3. And twenty percent do not exercise at all!(P. 13)
not...at all意为“一点儿也不、根本不”；not at all表示“没关系、不用谢”。
4. The answers to our questions about watching television were also interesting. (P. 13)
名词answer后常跟介词to，表示“……的答案”，类似的名词还有key，solution，ticket。
Your answer to the question is right.
5. Although many students like to watch sports, game shows are the most popular. (P. 13)
although用作连词，表示“虽然、即使”，相当于though，用来引导让步状语从句。在英语中，although/though和but不能同时出现。
Although it rained heavily, the boys played outside.=It rained heavily, but the boys played outside.
6.It is good to relax by using the Internet or watching game shows, but we think the best way to relax is through exercise. (P. 13)
(1) by可以用来表示方式，意为“通过”，后接名词或者动名词短语。
(2) way表示“方法”时，后常接动词不定式或者of doing作定语。
7.Exercise such as playing sports is fun, and you can spend time with your friends and family as you play together. (P. 13)
(1) such as一般用于列举同一类人或物中的一个例子，但必须数量少于前面所提及的总数，只能放在所列举的名词前；for example一般用于列举一个例子，后面经常加上一个句子，位置很灵活，可位于句首、句中，于被列举的事例之间用逗号隔开。
(2)【拓展】辨析spend, pay, take和cost
spend 主语是人 spend...on sth./spend...(in) doing sth.
pay 主语是人 pay for sth./pay +金钱. for sth.
take 主语是it It takes sb.+时间+to do sth.
cost 主语是物 sth. costs sb.+金钱
8.Jane is a 16-year-old high school student in the United States. (P. 15)
16-year-old意为“16岁的”，其中的名词用单数形式，在句中作定语，16 years old表示“16岁”，在句中作表语。
Li Bo is a seven-year old boy.=Li Bo is seven years old.
9.However, she has some bad habits, too. (P. 15)
(1) however作副词，表示“但是、然而”，常位于句首，后面常常跟有逗号隔开。
(2) also, too, as well与either都可以表示“也”，但是用法不同。
also 放在句中行为动词前，be动词、助动词和情态动词之后。 He also wants to go.
too 用于肯定句中，放在句尾，前面用逗号隔开。 He wants to go, either.
as well 用于肯定句中，放在句尾，前面不用逗号隔开。 He wants to go as well.
either 用于否定句句末。 He doesn’t want to go either
10.She says she is afraid. (P. 15)
be afraid of意为“害怕、不敢”，后接名词、代词或者动名词。
She is afraid of snakes. I was afraid of going through the woods.
[拓展]
1. be afraid to do sth. 意为“胆小不敢做某事”。He was afraid to go out at night.
2. be afraid that...意为“担心、害怕”。He was afraid that he would lose.
3. I’m afraid表示“恐怕”。
-Can we go there on time?-I am afraid not.
