27．---Your composition is full of mistakes.

---I wish I_________more careful.

A．would have been

B．had been

C．would be

D．Were

下列 ______ 属于攻击方法。 Ⅰ．复制信息 Ⅱ．剪裁信息 Ⅲ．窃听信息

A．Ⅰ和Ⅱ

B．Ⅱ和Ⅲ

C．Ⅰ和Ⅲ

D．全部