题目内容
句型转换
They looked at the blackboard.
(改为一般疑问句)________ they ________ at the blackboard?
答案:Did;look
练习册系列答案
相关题目
题目内容
句型转换
They looked at the blackboard.
(改为一般疑问句)________ they ________ at the blackboard?