Reading Further
1.People could not live without plants. 没有植物,人们就不能生存。
【注意】这个句子使用了虚拟语气,表示假设与事实相反。 虚拟条件通过without 引导的介词短语来表示,相当于if there were no （plants)。
Life would be really hard without electricity. 没有电,生活会变得很难。
【拓展】如果是对过去发生的事情的假设,则要用could/might/would have done。
We couldn’t have completed the task without your generous help.
没有你的慷慨帮助,我们不可能完成这个任务。
Without computers, much of today’s advanced technology wouldn’t have been achieved.
如果没有电脑,今天的许多先进科技就无法实现。
2.Trees add to the beauty of our surroundings, give us pleasant shade and help make the air clean.
树木让我们的环境变美,给我们宜人的树荫,还能清洁空气。
add to to increase 增加；添加
The bad weather added to （increased； enhanced) our difficulty.
坏天气增加了我们的困难。
【拓展】 add 的其他含义及表达。
If the mixture seems dry, add water. 如果这个混合物看上去是干的,那就加点水。
Add 2 and 5 to make 7. 2 加5 得7。
The numbers add up to （make a total amount of) exactly 100.
这些数字加起来刚好100。
“And I don’t care what you think,” she added （said more about something).
“我不在乎你怎么想的,”她补充说道。
3.Can you trace your family tree back farther than your great-grand parents?
你能在你家的家谱上查到你曾祖父母以前祖辈的信息吗?(https://www.daowen.com)
trace vt. to find the origin or cause of sth. 追溯；跟踪（n.痕迹；踪迹)
She could trace her family tree back to the 16th century. 她能把本族家谱追溯到16 世纪。
The style of these paintings can be traced back to （date from； date back to) early medieval influences.
这些绘画的风格可以追溯到中世纪早期的影响。
His call was traced and half an hour later the police arrested him.
他的电话被追踪了,半个小时后警方就逮捕了他。
Policemen searched the area but found no trace （mark or sign) of the escaped prisoner.
警察搜索了那一地区,但未发现越狱逃犯的任何踪迹。
4.It has a sweet smell, and usually comes in four colours: red, pink, yellow or white.
它有着甜美的香味,通常有四种颜色:红、粉、黄和白。
come in to have 有
Cats come in many shapes and sizes. 猫有不同的形状和大小。
This particular bag comes in four different colours. 这一款包有四种不同的颜色。
5.It is a symbol of loveliness. 它是可爱的象征。
symbol n. sth. that has a particular meaning or represents a particular idea 象征
The dove is a symbol of peace. 鸽子是和平的象征。
White has always been a symbol of purity in western cultures.
在西方文化中,白色一向象征着纯洁。
【比较】symbol/sign/signal/mark
续表
