She searched her memory for something that she could have done to upset him.她极力回想自己做过什么使他生气的事情。

It forces you to search your memory for the right answer.这迫使你为了正确答案而冥思苦想。

She searched her memory to try to recall what she'd been told about him.她努力回想, 试图记起别人告诉的关于他的事情。