对画线部分提问（Tom was playing ping-pong when l left.)Tom was playing pi_英语解答

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

人气：224 ℃　时间：2020-01-26 00:20:29

解答

When was playing\
不用while来提问