[ Vocabulary ]
Organisms must ………. to survive in an ever-changing environment.
A. adapt
B. evolve
C. erode
D. affect

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Modal and Modal PerfectGrammar - Punctuation of SentencesActive Voice-Present tensePast Simple VS Used toGrammar: Reported QuestionsTenses UsagePast Simple & Past PerfectTenses and ArticlesSimple Past/Past ProgressiveWH- Question WordsOther quiz:
Grammar › ViewLook at ________ mice in the cage.
A. those
B. this
C. that
Conjunctions › View
You can’t get a good mark ___ you study hard.
A. since
B. unless
C. either … or