题目

He transplanted the rare flowers to the botany garden_______it was the best time for them. A.where         B.when          C.until           D.that 答案：B 解析: 考查状语从句。when引导时间状语从句。Children should be taught to_________ right wrong.         [     ]A. distinguish ; from                 B. tell; from        C. separate; from                    D. all the above