Is it that you often play computer games ________ worries your parents?

A．why

B．that

C．which

D．what

为防止烤瓷熔附金属全冠戴入后食物嵌塞，应采取的措施除了（）

A．恢复正确的邻接关系

B．面边缘与邻牙一致

C．去除对充填式牙尖

D．去除该牙的接触

E．加深颊舌沟