[ Grammar ]
Carbon dioxide is produced in huge amounts when_______ are burned.
A. greenhouse gas
B. deforestation
C. power plant
D. fossil fuels
Select your answer:

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Present Simple: affirmative, negative, interrogativeActive-Passive VoicesContinuous Tenseanother/the others/each other/one anotherSimple Present TensesDirect Object and Indirect ObjectConditional Sentence Type 2 and Type 3Vocabulary and UsagePassive Voice Active VoiceAll, Both, Neither, None, EitherOther quiz:
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A. active voice
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………………. you live in a big city?
A. Do
B. Does
C. Have
D. Has
