_____ worries the doctor most was _______ they could find the cause of the disease.

A．What; how

B．That; that

C．What; what

D．How; what

根据学生组织方式的差异，可以把教学组织形式分为（）。

A.探究学习

B.个别化教学

C.分组教学

D.自主学习

E.班级授课