Question

【题目】当你回首往事时，不因虚度年华而悔恨。(look)
When you your life, you'll have no regrets over any time you wasted.

Answer 1

【答案】look back at
【解析】当你回首往事时，不因虚度年华而悔恨。(look) look at看---；back，后面，向后；故填look back at。