The higher the content of carbon dioxide in the air is,_____.

Câu hỏi :

The higher the content of carbon dioxide in the air is,_____.

A. the more heat it retains

B. the heat it retains more

C. it retains the more heat

D. more heat it retains

* Đáp án

A

* Hướng dẫn giải

Double comparison. The+ comparative, The+ comparative

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