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对画线部分提问（Tom was playing ping-pong when l left.)Tom was playing ping-pong when l left.-------------------- ----- Tom ----- ping-pong?关键是时态啊,用while还是when?

分类: 作业答案 • 2021-12-28 11:30:05

问题描述：

对画线部分提问（Tom was playing ping-pong when l left.)
Tom was playing ping-pong when l left.
--------------
------ ----- Tom ----- ping-pong?
关键是时态啊,用while还是when?

答

When was playing\
不用while来提问

对画线部分提问（Tom was playing ping-pong when l left.)Tom was playing ping-pong when l left.-------------------- ----- Tom ----- ping-pong?关键是时态啊,用while还是when?

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