计算6a2﹣5a+3与5a2+2a﹣1的差，结果正确的是 [ ]
A．a2﹣3a+4
B．a2﹣3a+2
C．a2﹣7a+2
D．a2﹣7a+4
答案：D
(2013·高考新课标全国卷Ⅱ)—I’m sorry I made a mistake!
—________.Nobody is perfect.
A．Take your time
B．You’re right
C．Whatever you say
D．Take it easy
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