题目内容
—Can you tell me_____?
—Sure. Two years ago.
—Sure. Two years ago.
[ ]
A. when did they build the new teaching building
B. when they build the new teaching building
C. when they built the new teaching building
D. when they are building the new teaching building
B. when they build the new teaching building
C. when they built the new teaching building
D. when they are building the new teaching building
C

练习册系列答案
相关题目