[ Grammar and Vocabulary ]
The sun is a very important …… of energy.
A. source
B. force
C. means
D. method
Select your answer:

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Degree of ComparisonPresent Simple x Present ContinuousPossessive PronounsGrammar: so and suchFuture SimpleSimple Past TensePresent Perfect Tense and Simple Past TenseCoordinating ConjunctionWill & Be going toSimple Future - PassiveOther quiz:
Grammar › ViewJenny and Sarah prepared cupcakes.
A. Compund subject
B. compund predicate
C. simple subject
D. simple predicate
Gerund › View
It is easy ___________ this question.
A. to answer
B. answer
C. answer
D. answering