[ Adverb & Compound Sentences ]
__________ the teacher explains the concept well, __________ the students take notes, they will understand the topic more clearly.
A. While, or
B. Once, but
C. If, and
D. Since, so

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Grammar › ViewWorkers at the construction site must wear safety equipment _______.
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She ___ speak six languages
A. can
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Either my dogs or my cat _____ making too much noise
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