I have no doubt that he will pass the exam, but I still think there is something about _____ he has really got everything ready.

A．that

B．whether

C．how

D．Why

血的营养滋润作用体现在()

A．面色红润

B．肌肉丰满壮实

C．皮肤润泽

D．毛发乌黑光泽

E．感觉和运动灵活自如