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Canning (is) the (most wide) used (method) of food (preservation).（）

A. is
B. most wide
C. method
D. preservation

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(Prior to) our (conference), the (executive) director had requested that everyone (was) well prepared.（）

A. Prior to
B. conference
C. executive
D. was

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He is opposed (to) the project (for the reason why) it is not (feasible) (for the time being).（）

A. to
B. for the reason why
C. feasible
D. for the time being

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