Topics: Adverb and Noun Clauses
…………..added to a liquid, antifreeze lowers the freezing temperature of that liquid.
A. That
B. As is
C. It is
D. When
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It was in 1875 ………….. joined the staff of the astronomical observatory at Harvard University.
A. that Anna Winlock
B. Anna Winlock, who
C. as Anna Winlock
D. Anna Winlock then