单选题
All plants need light, a suitable climate, and a(n) ______ supply of water and minerals from the soil, but some species grow best in the sun and others thrive in the shade.
【正确答案】
D
【答案解析】an ample supply of water and minerals充足的水和矿物质供应。ample充足的，丰富的；boundless无边无际的；supplementary补充的，附加的；continual连续的，持续不断的。