An old friend of mine called me up this morning,but he refused to tell me his present ________.

A．home

B．place

C．where

D．whereabouts

下列除哪项外均为药材五倍子中肚倍的性状鉴别特征（）

A.呈棱形，具不规则的钝角状分枝

B.表面灰褐色或灰棕色，微有柔毛

C.质硬而脆，断面角质样

D.内有黑褐色死蚜虫及灰色粉末状排泄物

E.气特异，味涩