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问题 选择题

My father has a small _________ collection.[ ]

A. sport

B. sport's

C. sports'

D. sports

答案

答案：D

填空题
设x，y满足
x2
4
+y2=1，则k=（x-1）2+y2的最大值为______，最小值为______．
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选择题

— Did you happen to hear the recent news?

—Yes, Alice ____ the entrance examination, which I find hard to believe．

A．fails

B．had failed

C．failed

D．will fail
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