Nylon ______________ in the 1930s A. invented B. was invented ...

[ Vocabulary and grammar ]

Nylon ______________ in the 1930s

A. invented

B. was invented

C. is invented

D. has been invented

Select your answer:
A B C D E

Random Topics:

Will or Going to Infinitives Communicative Grammar Adjective Clause and Adverb Clause Grammar: was/were Grammar / Pronouns Personal & Possessive Pronouns Comparatives and Conjunctions Conjunctions and Prepositions Grammar - Present Perfect

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