4)隐含(Implied)
有时候,尤其在写叙述性或描写性段落时,当所有的细节都围绕着一个显而易见的主题时可以不用主题句。
Exercise 2-1
Directions: Read the following paragraphs and identify the topic sentence. If it is implied, summarize it yourself.
(1)
But no matter what it is called, all polyester has certain good points. It does not wrinkle easily. It dries quickly after it is washed. It holds its shape. It is strong and keeps its colors well.
Topic Sentence:____________________________________________
Position:________________
(2)
Black is the colour of mourning. Red symbolizes danger,violence,or bloodshed. If you are afraid, you are yellow. None of these sayings is true outside the English speaking world. In China and Korea, white is the color of mourning. In Russia red stands for beauty and life. In Italy and Germany you are yellow with anger,not with fear.
Topic Sentence:_____________________________________________
Position:__________________
(3)
Our chief source of fresh water is rainfall that collects in lakes,rivers, and reservoirs. Recently, however, we have discovered anew source, aquifers, which are rock formations containing water.Even under deserts, vast aquifers may be waiting to be tapped.Companies drilling for oil in the Middle East have sometimes struck aquifers, which provide unexpected water supplies for arid regions.
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