[ Grammar ]
Choose the pronoun to replace the underlined word.
Scientists are constantly testing and retesting the scientist’s findings.
A. Him
B. It
C. Us
D. Their
Select your answer:
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A. can
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Write the form of the verb specified in parentheses. Before Mr. Kaufman’s fourth child was born he (buy / past perfect) a heavy-duty clothes washer.
A. buy
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