[ Vocabulary ]
A biological community of interacting organisms and their physical environment
A. oxygen
B. boreal
C. biodiversity
D. ecosystem

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Noun ClauseCompound Words and SentencesDescriptionsPoetry VocabularyPresent and Past TenseSubordinating ConjunctionPresent ProgressiveTenses and PronounsIndefinite and Definite ArticlesConnectivesOther quiz:
Grammar › ViewEarly to bed, early to rise, makes a man healthy, wealthy, and wise.
A. Wealthy men are healthy.
B. Wise men are healthy.
C. Someone who gets enough sleep and startswork early in the day will have a successful life.
D. You need to go t
Indefinite Pronoun › View
What do … need to know before renting a car?
- everyone
- ones
Grammar › View
What does it mean?
You shouldn’t have made him think there’s something special going on.
___
A. I made him think that way.
B. I didn’t make him think that way.
Past Participles › View
What’s the past participle of the verb|: know
A. knowed
B. know
C. known
