Alice was supposed _____ at home, but her mother found her surfing the Internet．

A．studying

B．to be studying

C．to have studied

D．studied

在客户信用等级和客户评价报告的有效期内，对发生影响客户资信的重大事项，商业银行应重新进行授信分析评价。重大事项包括（）。

A.客户盈利发生变动

B.外部政策变动

C.客户组织结构、股权或主要领导人发生变动

D.客户的担保超过所设定的担保警戒线