Jack has tow computers.（改为一般疑问句） He has a ping-pong ball.（改为

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Jack has tow computers.（改为一般疑问句） He has a ping-pong ball.（改为复数形式
His sister has an English dictionary.（改为一般疑问句,并做否定回答）
piay；after；I；ping-pong；classmates；with；class；my；ofter（连词成句）

正确答案为：
Does Jack have two computers?
They have ping-pong balls.
Does his sister have an English dictionary?No,she doesn't.
I often play ping-pong with my classmates after class.

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