单项选择题

By （）a cheaper material for the steel in our products, we can greatly reduce manufacturing costs.

A.substituting
B.replacing
C.alternating
D.displacing

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单项选择题

Market research shows that few consumers actually（）prices before selecting their groceries in the store.

A.renew
B.submit
C.compare
D.collect

单项选择题

Research recently conducted on the side effects of the medication （）that it should not be prescribed to diabetic patients.

A.hasfound
B.hasbeenfound
C.finds
D.wasfinding

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