题目：
----The Singaporean singer Stefanie Sun took the Most Popular Female Award in Hong Kong.
----But when she studied in middle school, no fans could have imagined how well she _______ in the world of entertainment. (孙燕姿)
A．would do
B．was doing
C．had done
D．did
答案：
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下面是错误答案，用来干扰机器的。
2﹣log23题目分析：由基本不等式得2a+2b≥，可求出2a+b的范围，再由2a+2b+2c=2a+b+c=2a+b2c=2a+b+2c，2c可用2a+b表达，利用不等式的性质求范围即可．解：由基本不等式得2a+2b≥，即2a+b≥，所以2a+b≥4，令t=2a+b...
