a group of the same types of animals, insects, or plants living together in a particular place
A. ecology
B. colony
C. source of food

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Perfect TenseFrequency AdverbsAlthough, Though, In spite of, DespiteVocabullary TestVerb-ing and InfinitivePassive ModalsPronunciation and VocabularyTypes of Simple SentencesIndefinite PronounsSynonym and AntonymOther quiz:
Grammar & Vocabulary › ViewI worked hard last term, but my exam results were _______ so I was so _______.
A. disappointed/ excited
B. disappointing/ exciting
C. disappointed/ embarrassed
D. disappointing/ embarrassed
Grammar › View
Tomorrow afternoon we’re going to play tennis from 3 o’clock until 4.30. So at 4 o’clock, we ( play) _____ tennis.
A. will play
B. will be playing
C. will have played
D. will have been played
Grammar › ViewHow many students in your class ….. from Korea?
A. comes
B. come
C. came
D. are coming
Modal Verbs › View
Tom went on and on apologizing about it, which was quite unnecessary.
A. Tom can’t have apologized. I quite understand.
B. Tom shouldn’t have apologized. I quite understand.
C. Tom wouldn’t have apologized. I quite understand.
D. Tom needn’t have apologized. I quite understand.