Lifecanbehard
问题详情：
Life can be hard __________, but you must keep your head held high and stay positive.
Never let anyone bring you down.
A. at all times B. all the time C. at a time D. at times
【回答】
D
知识点：介词和介词短语
题型：选择题
问题详情：
Life can be hard __________, but you must keep your head held high and stay positive.
Never let anyone bring you down.
A. at all times B. all the time C. at a time D. at times
【回答】
D
知识点：介词和介词短语
题型：选择题
