In our life, one question that es up is:“to be or not to be?”
A. briefly
B. entirely
C. fluently
D. frequently
网友回答
A. briefly
B. entirely
C. fluently
(答案→)D. frequently
解析：A.briefly简要地，B.entirely 完全地，C.fluently流利地，D.frequently频繁地，句意：--在我们的生活中，经常出现的问题是：“生存还是毁灭？”，所以选D。