在上运动神经元和感觉完好情况下，右上腹壁反射消失提示( )。

A．右侧胸髓3～4节段病损

B．右侧胸髓5～6节段病损

C．右侧胸髓7～8节段病损

D．右侧胸髓9～10节段病损

E．右侧胸髓11～12节段病损

Look! Xiao Wang is too sleepy to work . He ____ up watching TV .

A．mustn''t have stayed

B．shouldn''t have stayed

C．mustn''t stay

D．ought not to stay