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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