单项选择题

A. Walking on Mars will be easier than walking on the Moon.
B. There is more gravity on the Moon than on Mars.
C. Walking quickly will be difficult on Mars.
D. Astronauts on Mars will require more oxygen than will astronauts on the Moon.
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单项选择题
A. To improve the diets of hens.B. To move chickens into large farms.C. To make chickens sleep before they are killed.D. To improve chickens’ lives.
A. To improve the diets of hens.
B. To move chickens into large farms.
C. To make chickens sleep before they are killed.
D. To improve chickens’ lives.
单项选择题
A. The tone students had when talking about their parents: fond, warm and admiring. B. The young women keep in close touch with their families, discussing matters big and small, academic and personal. C. Many students turn to their parents for help with everything from roommate troubles to how to improve the paper they e-mailed home. D. Not all college students are closely connected with their parents.
A. The tone students had when talking about their parents: fond, warm and admiring.
B. The young women keep in close touch with their families, discussing matters big and small, academic and personal.
C. Many students turn to their parents for help with everything from roommate troubles to how to improve the paper they e-mailed home.
D. Not all college students are closely connected with their parents.
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