Your prices exceed world prices by 5%（）
A. 你的价格是市场价格的5%。
B. 贵方价格超过世界市场价格的5%。
C. 你方价格已在世界市场价格上增加了5%。
D. 贵方价格远远地超过世界市场价格的5%。
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you got Ul5 late won't be a sufficient excuse for your being late for class（）
A. It is
B. That
C. Because
D. What
We can conclude from this passage that ______.
A. the heat created in microwave ovens is very difficult to control
B. food tastes better when cooked in a microwave oven
C. food cooked in microwave ovens is probably more nutritious than food cooked in more conventional ways
D. most research on the effects of microwaves on human beings has been restricted to the study of low level microwave radiation
English didn't become the official language of the England until______ after the Hundred Years' War.
A. [A] 12th
B. [B] 13th
C. [C] 14th
D. [D] 15th
Two systems of weights and measures used in the U.S. are ______.
A. the U. S. Customary System and the metric system
B. the International System and the metric system
C. the Imperial System and the metric system
D. the Customary System and the Imperial system
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