Apple's iphone4S disappointed its fans，its later success was beyond what people could expect．
A. When
B. As
C. Unless
D. While
网友回答
A. When
B. As
C. Unless
(答案→)D. While
解析：考查连词辨析。A当..时；B随着…；C除非…；D当…时；然而，尽管；句意：尽管苹果4S让果粉很失望，但是后面的成功却超出了人们的期望。根据句意说明D正确。