—I ______ for you for two hours, but in vain. Where did you go?                           

—I ______ at my uncle’s.

A．had looked; may have stayed

B．looked; must have stayed

C．have looked; may be staying

D．looked; must be staying

下列有关《布列斯特和约》的说法中，错误的一项是( )。

A．是俄国与协约国集团签订的

B．俄国要支付大量赔款

C．俄国因此得以退出一战

D．俄国割让了大量领土