[ Grammar ]
A defect can be caused ………….. negligence by one of the members of a team.
A. by
B. to
C. at
D. in

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Grammar on Conditionals › ViewIf I ____ a billionaire, I would buy an island.
A. were
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Choose the correct word to complete the sentence. We saw the ______________________ crown at the museum.
A. queens
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C. queen’s
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Vocabulary › ViewThe very center of the coordinate plane, where (0, 0) is located.
A. the beginning
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They are singing for his birthday.
What type of verb is highlighted?
A. main verb
B. helping verb
