These ducklings are on the river.（否定句）
They sing the songs in the hall.（同上）
Peter can read the picture books.(can改成always)
人气：246 ℃ 时间：2020-08-14 13:32:06
解答
These ducklings are not on the river
They donnot sing the songs in the hall.
Peter does not always read the picture books.
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