Luôn giúp mk nhé
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the environment. You can estimate your carbon footprint on any number of popular websites: If it’s (4) ______, then you’re probably leading a relatively green lifestyle. But (5) ______ happens if it’s big?

Well, the answer is that you can balance it. People contribute to balancing the negative effects of their actions by using green fuels, recycling, reforestation and a number of other activities which are said to contribute to a lowering of the carbon dioxide.

1. A. number B. quality C. amount D. period
2. A. Because B. Although C. However D. Due to
3. A. for B. to C. on D. in
4. A. large B. small C. free D. bad
5. A. when B. why C. how D. what