[ Grammar ]
I’ve read the _____ of this book three times but I still can’t understand what it’s about.
A. introduction
B. introducing
C. introduced

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Grammar - QuantiflierTime Clauses of FutureCommon Grammar Mistakes and Spelling TipsPresent simple, Present continuous, Singular, PluralSubject Verb Agreement; Indefinite PronounsFuture PlansClauses and ConjunctionConjunctions and TransitionsVerbs + Infinitives / GerundsPresent Simple & Present ContinuousOther quiz:
Vocabulary & Grammar › View. What is most directly related to “health”?
A. A struggle to win a prize
B. A person’s physical and mental well-being
C. A major rebellion
D. A creative invention
Coordinate Conjunction › View
The universe is a big place, ________ there may be intelligent life out there.
A. for
B. or
C. nor
D. so
