Over the years she had tried her best to the terrible memory but it was not an easy task

问题补充：

Over the years she had tried her best to the terrible memory, but it was not an easy task.

A. live on

B. block out

C. bring back

D. call up

答案：

A. live on

B. block out

C. bring back

D. call up

解析：短语辨析。A靠...生活；B阻塞,堵住,封锁；C拿回来, 使回忆起来, 使恢复；D召集,动员;打电话;使人想起；句意：在过去的几年里，她努力的不去回忆那些可怕的记忆。但是这并不容易。