A 3G mobile phone, to be most useful and fashionable, is popular with some teenagers.
A.consider
B.considering
C.considered
D.to be considered
网友回答
C解析考查过去分词作定语。be considered to be 被认为，句意：被认为是最有用最时尚的3G手机在一些青少年中很受欢迎。Considered作定语修饰A 3G mobile phone，所以选C。