[ Vocabulary ]
Specialization of cooperative labor
A. Efficiency
B. Division of labor
C. Factors of production

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PronounSo, Such, Many, MuchVerb Tenses and ModalsGerunds as Objects of PrepositionsPast Perfect and Past Perfect Continuous TenseVerb + Infinitive or GerundVocabulary and Verb TensesPossessive AdjectivesGerunds & Infinitives + VocabularyProgressive TensesOther quiz:
Vocabulary › ViewThe water _______ in nature ensures a continuous supply of nutrients to aquatic ecosystems.
A. challenge
B. hardship
C. despite
D. cycle
Tenses › View
He had asked the permission of his boss.
A. Past perfect
B. Present perfect
C. Past simple
Present Simple and Continuous Tense › ViewHe __________ (read/reads) a book every night before bed.
A. read
B. reads
C. reading
D. is reading
Grammar › View
I’d love to _____ speak better French – I’ve been studying the language for five years now.
A. be able
B. able to
C. be able to
