Susan wanted to be independent of her parents.She tried ________ alone, but she didn't like it and moved back home.

A．living

B．to live

C．to be living

D．having lived

以下属于效力待定合同的有( )。

A．越权订立的合同

B．因重大误会订立的合同

C．无权代理人订立的合同

D．无处分权人订立的合同

E．可撤销合同