[ Grammar ]
What is the main purpose of our immune system?
A. To help us move
B. To help us breathe
C. To help protect us from bacteria and viruses
D. To help our hair grow

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Infinitives and GerundsConjunctions and PrepositionsModalsTimeSome & AnySynonyms and VocabularyComparison of Adjectives and AdverbsTOEICPast Perfect Simple TenseAdjectives, ING - EDOther quiz:
Vocabulary › ViewEarthquake waves travel slowly through the hotter parts of the ______ and speed up in colder, denser areas.
A. kinetics
B. mantle
C. lipids
D. latitude
Grammar › View
You’ve … it in pencil.
A. wrote
B. writen
C. written
D. writed