[ Vocabulary ]
energy sources formed over millions of years from the remains of dead organisms
A. energy conservation
B. fossil fuels
C. renewable resources
D. human impact
E. sustainability

Random Topics:
Comparative AdjectivesPresent & Past TensesGrammar - QuantiflierInfinitive FormsAdverb Clause ConnectorTenses and ArticleGerunds + To InfinitivePassive VoicesActive-Passive VoicesAction, Helping & Linking VerbsOther quiz:
Grammar › ViewHe has taken recently an English course.
A. Correct
B. Incorrect
Comparisons › View
More clothes is consumed nowadays than ten years ago.
A. Not so much clothes was consumed ten years ago as nowadays.
B. Clothes consumption is going down nowadays.
C. We had more clothes ten years ago than we do nowadays.
D. We should consume as much petrol as possible.
Tenses › View________ my neighbors were having a picnic, the rain started to pour down
A. when
B. while
C. during
D. before
Grammar › View
The poor helpless orphans _______________ away by the strong tidal waves.
A. sweep
B. were sweep
C. were swept
D. was swept
