Yungang Grotto and Longmen Grotto mainly represent ( ). A: the content of Buddhism B: the content of Taoism C: the content of Islam D: the content of Christianism

The maximum height _________ the grotto is 40 meters, and the width is 30 meters, while the minimum height of the grotto is less than an inch. A: with B: of C: on

Building is to foundation as plant is to______. () A: primer B: root C: floor D: grotto E: pane