According to the Kobata method,______of activated carbon can be obtained from used tires.
A. 1.5 kilograms
B. 7 kilograms
C. more than one fifth
D. 93 percent
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When Washington D．C．was burned in 1814, Dollety Madison rescued many official papers from the White House.
A. stole
B. filed
C. hid
D. saved
Netscape is an influential web site which is visited by millions of people.
A. Right
B. Wrong
C. Not mentioned
请选择（7）处的最佳答案．
A. extensive
B. entire
C. overall
D. enormous
Mary' s daughter showed ingenuity in making a dress for her doll.
A. thoughtfulness
B. cleverness
C. sincerity
D. truth
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