The fact that most left-handed mothers hold the baby on their left side renders the first explanation unsustainable.
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The river widens considerably as it begins to turn west.
I didn't help him. I would have, however, I didn't have the money.
根据下列短文,回答 23~26 题。
第 23 题 Paragraph 1 _________.
The reason why children learn their mother tongue so well lies solely in their environment of learning.