男，10岁，右耳分泌性中耳炎，鼓室积液，用波氏球咽鼓管吹张法，症状无改善，清除中耳积液的首选方法是

A．鼓膜切开术

B．鼓膜穿刺术

C．鼓室置管术

D．腺样体切除术

E．上述都不是

There is a high probability _________ you will find aspirin and penicillin in any medicine cupboard in the world.

A．that

B．which

C．what

D．where