根据句意及所给的词首字母或汉语提示，补全单词。
(注意：须把完整的单词写在答题卡的相应位置)
We’d better drink a glass of m    every day. It’s good for our health.
—I’ve never been to Beijing.  —I haven’t, e    .
—How often do you go to a concert?  —O     a week.
The book I want is right at the          (底部) of the shelf.
Both of the jackets look nice on me. I can’t decide which one to       (选择).