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题目内容
（河北建筑工程学院大学英语3）
The teacher asked the children_____ they_____ the things in the lad that morning .得分：4分
A.if ,had touched
B.where did ,touch
C.when ,touch
D.when did ,touched
A.if ,had touched
B.where did ,touch
C.when ,touch
D.when did ,touched
参考答案