单项选择题

A. The birds can fly upward to the air.
B. The birds are able to use the upward airstream.
C. The birds can create airstream using their wingtips.
D. The birds more rely on the front leading birds.
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单项选择题
A. Like economies, the resources on planes are limited. B. Everyone should enjoy the equal right on a plane. C. The society is unfair when transportation right is concerned. D. The rich should pay more money to enjoy better air.
A. Like economies, the resources on planes are limited.
B. Everyone should enjoy the equal right on a plane.
C. The society is unfair when transportation right is concerned.
D. The rich should pay more money to enjoy better air.
单项选择题
A. Cigarette smoking still kills 443,000 Americans every year.B. Cigarette smoking still kills less than 443,000 Americans every year.C. Cigarette smoking still kills approximately 443,000 Americans every year.D. Cigarette smoking still kills over 443,000 Americans every year.
A. Cigarette smoking still kills 443,000 Americans every year.
B. Cigarette smoking still kills less than 443,000 Americans every year.
C. Cigarette smoking still kills approximately 443,000 Americans every year.
D. Cigarette smoking still kills over 443,000 Americans every year.
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