[ Vocabulary ]
We need to use sources of ___ which are environmentally friendly.
A. energy
B. products

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Similes and Body IdiomsCommunicative GrammarConditional ClausePossessive Nouns with Apostrophes and PronounsGrammar and SyntaxFirst ConditionalDescriptionsTransitive or Intransitive VerbsNoun Phrases and AdverbialsConditional 0Other quiz:
Adverb › Viewmore quickly
A. positive
B. comparative
C. superlative
Vocabulary › View
to dig out and remove
A. Excavated
B. Perimeter
