I have many friends
VocabularyIrregular VerbAdjective vs. AdverbHelpful Phrases Conditional Sentences Type I, IIAdjective OrderRelative PronounModals, Phrasal Verbs, Gerunds and InfinitivesVerb Tenses
Other quiz: Grammar
Plastic bottles are less expensive to __________.
A. production (n)
B. produce (v)
C. productive (adj)
D. productively (adv)
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