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

Random Topics:
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:
Grammar and Vocabulary › ViewApply the correct punctuation: ‘She said she would come however she was late’ or ‘She said she would come; however, she was late.’?
A. She said she would come, however she was late.
B. She said she would come. However, she was late.
C. She said she would come; however she was late.
D. She said she would come; however, she was late.
Modal Verbs › View
It expresses obligation.
A. would
B. should
C. have to
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
