以下为银柴胡的性状特征的是（）。

A.呈类圆柱形，偶有分枝，长15～40cm，直径0.5～2.5cm

B.表面浅棕黄色至浅棕色，有扭曲的皱纹即支根痕，多具孔穴状或盘状，习称"砂眼"，从砂眼处折断可见棕色裂隙中有细砂散出

C.根头部略膨大，有密集的呈疣状突起的芽苞、茎或根茎的残基，习称"珍珠盘"

D.质硬而脆，易折断，断面不平坦，较疏松，有裂隙，皮部甚薄，木部有黄、白色相间的放射状纹理

E.气微，味甘

. Although most of them have no doubt ________ he will pass the exam , I still wonder _______ he has really got everything ready.

A．whether; that

B．that; whether

C．that; that

D．whether; whether