一.按要求改句.
1.Theyoftendotheirhomeworkatseven.(一般疑问句.否定句.并作肯定或否定回答)
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2.Wehavesportsintheafternoo,(同上)
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3.Icanseefivedogsunderthetree.(画线部分提问.划线是five.)
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4.Itoftensnowsinwinter.(改为一般疑问句.否定句.并作肯定否定回答)
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