新媒体营销“爆文”的四大要素（）
A. 优质的食材——选题
B. 独特的菜式——角度
C. 诱人的卖相——包装
D. 争相的拍照——分享
Fear is one of the many enemies hidden inside us, and if ____ uncontrolled, it can destroy our lives.
A. living
B. left
C. having left
D. to be left
She is always thinking more of herself, seldom, ____, offering to help others.
A. if never
B. it's possible
C. if ever
D. if any
The flowers he bought will die unless ____ everyday.
A. watered
B. watering
C. being watered
D. to water
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