—Was it under the tree you were away talking to a friend?—Sure. But when I got back ther

问题补充：

—Was it under the tree you were away talking to a friend?

—Sure. But when I got back there, the bike was gone.

A. that

B. where

C. which

D. while

答案：

A. that

B. where

C. which

(答案→)D. while

解析：考察连词辨析。Where在哪里；which哪一个；while当…时；本句中的it是一个代词，指代the bike，句意：当你去和朋友谈话的时候，自行车是在大树下下面吗？—当然。但是当我回到那里的时候，自行车以后不见了。根据句意说明D正确。