[ Grammar ]
Mum _________ (prepare) dinner when the doctor arrived.
A. prepared
B. prepares
C. has prepared
D. was preparing

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Grammar › View________ that the insulation has been replaced, the building is much more energy-efficient.
A. Now
B. For
C. As
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What are antecedents related to in grammar?
A. Verbs
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C. Pronouns
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In January.
A. Why
B. When
C. How
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Although some earthquakes are dangerous, most are not.
A. Complex
B. Not Complex
