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______the processof photosynthesis, green plants absorb carbon dioxcide and produce oxygen.

A. For
B. Through
C. It is
D. While

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________dog was the first animal to be domesticated is generally agreed upon by authorities in the field.

A. Until the
B. That the
C. The
D. It was the

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Demand for a consumer product depends on the incomes of buyers, their subjective preferences, and_______.

A. the prices of competing products
B. competing products are priced
C. waht are the competing products' price
D. how high the prices of competing products

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If negotiations for the new trade agreements take_____, critical food shortage will develop in several countries.

A. too much longer
B. the longer
C. much too longer
D. the longest

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When you have finished with that videotape,don't forget to put it in myh drwaer,_________?

A. do you
B. will you
C. don't you
D. won't you

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______the processof photosynthesis, green plants absorb carbon dioxcide and produce oxygen.

A. For B. Through C. It is D. While

________dog was the first animal to be domesticated is generally agreed upon by authorities in the field.

Demand for a consumer product depends on the incomes of buyers, their subjective preferences, and_______.

If negotiations for the new trade agreements take_____, critical food shortage will develop in several countries.

When you have finished with that videotape,don't forget to put it in myh drwaer,_________?

A. For
B. Through
C. It is
D. While