1. …………. business, a merger is a combination of two or more corporations under one management.
A. The
B. At
C. On
D. In

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1. In the preparation of fibrous material for production uses, stiff woody fibers from plants …………. fibers from animal sources.
A. the most heat the
B. need more heat than
C. than more heat needed
D. need the more heat than

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1. Poison oak generates irritating poisons …………. even if people merely brush against the plants.
A. they can affect people
B. that can affect people
C. what can effect people
D. which do they affect

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1. Black, red, and even bright pink diamonds ………………….
A. occasionally to find
B. occasionally found
C. have occasionally been found
D. have occasionally found

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1. In mathematics, a variable is a symbol …………….. some element of a set.
A. and representing
B. represents
C. that represents
D. represents that

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1. Modern industrial methods have supplanted individual crafts, ………………. stone carvers, coopers, and cobblers virtually extinct.
A. make blacksmiths,
B. made blacksmiths,
C. making them blacksmiths,
D. making blacksmiths,

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1. No one has been able to satisfactorily explain how or …………… the Moon sporadically sparks.
A. when
B. why
C. what
D. which

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