题目内容

—When shall we go planting trees in the hill?

—______ it begins to rain, so they don’t need watering.

 A. Not until          B. While                C. Till                   D. Unless

 

练习册系列答案
相关题目

违法和不良信息举报电话:027-86699610 举报邮箱:58377363@163.com

精英家教网