句型转换。
1. Wang Hong often helps her classmates．（改为否定句）
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2. Mr Wang will give us a talk next Sunday.（对画线部分提问）
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3. The children are reading.（加上write改为选择疑问句）
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4. My mother is doing some washing.（对画线部分提问）
_________ your mother ________?
5. Mr Wang is going to Beijing with his sister.（对画线部分提问）
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