问题描述：
请教初一英语. 填空：1、How long does it ＿＿＿＿（花费）you do exereise? （第二题见详细提问）谢谢
2、She is holding the baby ＿＿＿＿ her arms.
She is holding the baby on her arms.与 She is holding the baby in her arms.有什么区别呢？
2、She is holding the baby ＿＿＿＿ her arms.
She is holding the baby on her arms.与 She is holding the baby in her arms.有什么区别呢？
问题解答：
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