[ Vocabulary ]
The cost of producing one more unit of a good
A. Interest
B. Productivity
C. Marginal

Random Topics:
Parallel Structure or Combining SentencesAuxiliaries VerbAdjectives and VocabularyAnalogyas...as, comparatives, superlativesAdverbs and AdjectivesRelative Clauses PronounsRequest with Modal VerbsTypes of SentencesConditionals and WishesOther quiz:
Present Simple & Present Continuous Tenses › ViewThat house ______ Mr. Pike.
A. belong to
B. belongs to
C. belonged
D. are belonging
Grammar › View
What is the antecedent of the pronoun it?
Ivan left some music at the office. It was on a CD.
_____
A. Jinx
B. music
C. It
D. CD
Tenses › ViewThe boys __________________ in the garden when they __________________ their father’s steps. (WORK, HEAR)
A. had worked – heard
B. were working – heard
C. had been working – heard
D. are working – heard
Article › View
He eats …apple daily.
A. A
B. The
C. An
D. X
