2. 外语
  3. Complete the notes below. Write NO MORE THAN TWO WORDS for each answer. How to kill bad insects Chemical methods These solutions

Complete the notes below. Write NO MORE THAN TWO WORDS for each answer. How to kill bad insects Chemical methods These solutions

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问题 Complete the notes below.
Write NO MORE THAN TWO WORDS for each answer.
How to kill bad insects
Chemical methods
These solutions to insect problems often are not worthwhile because:
a)They are effective on a 【L36】______
b)They can bring harm to 【L37】______
c)Insects become 【L38】______to the chemicals quickly.
Biological methods
These methods are 【L39】______than chemical methods of eliminating insects.
Breeding control
In order to control the breeding of insects, one needs to understand the insects’ 【L40】______
【L39】
选项
答案cheaper
解析 cheaper本题题干只是换了一种说法，此外，通过题干可以预判此处应该填写形容词比较级形式，在听录音时，就要着重听比较级形式的词汇。原文：This is a cheaper alternative to chemicals．所以此处答案为cheaper。
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