时间状语从句描述生长过程 — 英语选择题
题目
一粒种子先长出根，之后幼芽才钻出土壤。哪句话正确描述了这一生长过程？A. The roots begin to grow before the shoot comes out of the soil. B. The roots begin to grow after the shoot comes out of the soil. C. The roots begin to grow while the shoot comes out of the soil. D. The roots begin to grow until the shoot comes out of the soil.