我真的很担心考试，但和医生谈话让我放下了心。

I was really worried about the tests, but talking to the doctor ___put my ___mind ___at ___rest.

我希望我的信能让你安心。

I hope my letter will ___put your ___mind ___at ___rest.

经理的一个安抚电话让他安心了。

A reassuring call from the manager ___set his ___mind ___at ___ease.