are forms of carbon has been known since the ...

[ Grammar ]

are forms of carbon has been known since the late 18th century.

A. Diamonds

B. Diamonds, which

C. Because diamonds

D. That diamonds

Select your answer:

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Types of Preposition Past Simple and Past Continuous Grammar (was, were, could, could not)Future Tense Verb Article the or zero article (-)Verb & Grammar Past Tenses Auxiliary Verbs (be, do, have)Verb and Preposition

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Choose the correct usage of apostrophe (‘)

A. My mothers cabin is next to his’ cabin

B. My mother’s cabin is next to his’ cabin

C. My mothers’ cabin is next to his cabin

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Grammar › View

What is the action verb in the sentence below?

Can you skip?

A. can

B. you

C. skip