Humans __________ the planet for centuries. A. have been damaging ...

[ Relative Clauses and etc ]

Humans __________ the planet for centuries.

A. have been damaging

B. have damaged

C. has damaged

D. have been damaged

Select your answer:

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Prepositions after Verbs and Adjective would should could Subordinate Conjunctions Comparison & Modal Verbs in Passive Voice Gerunds and Modals Modal and Relative Phrases Sentence Structure and Pronoun Antecedent Modals of Prohibition Adjective Suffixes

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Vocabulary › View

Barter

A. The result of an event (of a cause)

B. A Francophone descendant of the settlers of New France

C. The exchange of goods for other goods rather than money

D. Something that makes an event happen

Grammar › View

Choose the correct verb in the past tense by applying the grammar rules: Look

A. Looked

B. Looking

C. Looks