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（友情提示：鼠标拖选单词即时翻译）
21 I wonder what it feels like to have many children. _______ Hayes already have three and they are
planning to have _______ fourth.
A The; the B The; 不填 C 不填；the D The; a
22 I _______ you my best thanks for what you have done to me．
A owe B own C share D pay
23 --- ________ for the glass!
--- It’s OK. I am wearing shoes.
A Walk out B Go out C Look out D Set out