[ Vocabulary ]
The most desirable alternative given up as the result of a decision
A. Marginal
B. Efficiency
C. Opportunity cost

Random Topics:
So / Neither / Either / TooUsed to - Would - TensesPersonal Pronouns and VerbEnglish ArticlePronouns, Sentence Structure, and Figurative LanguagePast SimplePast ParticiplesModals and PrepositionGrammarPresent Progressive TenseOther quiz:
Gerund or to Infinitive › ViewA : Do you remember _________ me JK Rowling’s latest book?
В: Yes, I do. You haven’t given it back yet.
A. to lend
B. borrowing
C. to borrow
D. lending
Kinds of Nouns › View
subject
A. Common
B. Proper
C. Mass
D. Count
E. Collective
Grammar › ViewAdjective or Adverb: In the sentence “He is a fast runner,” what does the word “fast” describe?
A. He
B. Is
C. Runner
Grammar › View
I haven’t _____________ your keys.
A. see
B. seen
C. saw
