[ Vocabulary ]
Land, labor, and capital
A. Capital
B. Product possibilities
C. Factors of production

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Modals and TensesVerbs - third personGerund/ To Verb/ VerbContrastive ConjunctionsWill vs be going toApostrophe GrammarPast simple - Irregular VerbsAuxiliary WordsEd and Ing EndingsSubjunctivesOther quiz:
Grammar › ViewShe is a good teacher; thus, I think you__________to ask her for some advice.
A. oughtn’t
B. must
C. have
D. ought
Future Tenses › View
I want a refund! I _________ leave until the manager returns!
A. am not going to
B. will not
Modal Verbs › ViewYou _________ enter the doctor’s room now.
A. may
B. might
Tenses › View
It’s my parents’ wedding anniversary : they …………….for 14 years.
A. married
B. had married
C. were married
D. have been married