—Which sport are you in at the school sports meeting?

—No decision yet. I think it              after discussing with my PE teacher, Mr Yuan.[ ]

A. will be decided

B. will decide

C. was decided

D. is decided

与智齿阻生及发生冠周炎病因无关的是（）

A.由于咀嚼器官的退化

B.智齿萌出位置不足

C.阻生齿常为龈瓣覆盖，龈瓣易被咬伤发生溃疡

D.智齿无对颌牙

E.全身抵抗力下降