语法与词汇 As the mountains were covered with a _____ of cloud, we couldn’t see their tops.无

【正确答案】 C

【答案解析】句意：因为山脉被云笼罩着，所以我们不能看见山顶。 veil面纱；（薄雾等）半透明物。 coating涂层。 film电影；薄层。 shade色调；暗处。