根据句子后面括号内的提示,改变下列句子的句型
1. Mary was watching TV at home yesterday evening. （改为一般疑问句）
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2. They are playing basketball on playground now.（改为否定句）
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3. We were hiking at Wutong Mountain yesterday afternoon.（改为一般疑问句
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4.Peter was having a bath when the telephone rang last night.（改为否定句）
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5.Lily was having dinner when someone knocked at the door.（改为一般疑问句）
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