He transplanted the little tree to the garden it was the best time for it.A. whereB. whenC

问题补充：

He transplanted the little tree to the garden it was the best time for it.

A. where

B. when

C. what

D. that

答案：

A. where

(答案→)B. when

C. what

D. that

解析：本题考查状语从句。句中考查when引导的时间状语从句，表示“在……时候”。句意：他在最佳时候把小树移到花园。