“土苴”是泥土和草芥，此处用以比喻（）
A.民间药物
B.名贵药物
C.微贱药物
D.地方土产
参考答案：C
____ he has been chosen to work as a teacher in the mountain village ____ him feel very proud.
A．That, make
B．Whether, makes
C．That, makes
D．Where, make
喀斯特的地貌之所以能够形成山、水、洞结合的造型奇特的地貌景观，是因为其本身的红色沙砾岩在内外应力作用下发育而成的。( )
