中耳胆固醇肉芽肿与其他中耳疾病的关系的说法，错误的是（）

A.可有分泌性中耳炎病史

B.可导致胆脂瘤的形成

C.与骨疡性中耳炎易混淆

D.单纯鼓膜穿孔也可继发中耳胆固醇肉芽肿

E.只要中耳出血都可能导致

The manager along with his workers _______ day and night to complete the project.

A．have worked

B．work

C．is working

D．are working