[ Grammar ]
He has been very interested in doing research on __________ since he was at high school.
A. biology
B. biological
C. biologist
D. biologically
Select your answer:

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Grammar and SyntaxModals Of SpeculationReported speech (statements)Prepositions of Time & PlaceCompound SentencesInfinitive and GerundCan vs CouldModals and Present TensesSo....that... Such.......thatLinking VerbsOther quiz:
Articles › ViewFill in the blanks with appropriate articles (a, an, the).
I have fixed ___ appointment with ___ doctor.
A. a, an
B. an, the
C. a, the
Verb Tenses › View
Identify the tense of the underlined verb phrase in the sentence.
Clearly, she knows too much about the situation.
A. (simple) past
B. (simple) present
C. (simple) future
D. future perfect
E. future progressive
