问题补充:
One advantage of eating a balanced breakfast is it can keep you energetic throughout the day.
A. when
B. how
C. that
D. whether
答案:
A. when
B. how
(答案→)C. that
D. whether
解析:考查从句,从句it can keep you energetic throughout the day不缺少成份,when表示时间,既起连接作用,又有具体意思;how表示怎么,既起连接作用,又有具体意思;that只起连接作用,没有任何意义;whether表示是否,既起连接作用,又有具体意思;所以选C