Which of the following sentences is NOT right?[ ]

A. There is no doubt that you will succeed.

B. We have no doubt that you will succeed.

C. We don't doubt that you will succeed.  

D. We don't doubt whether you will succeed

儿童室管膜瘤最常发生于()

A．第三脑室

B．侧脑室

C．第四脑室

D．导水管

E．脑室旁