He is the only survivor of his family from the big earthquake.
He is the only one who ____ the big earthquake in his family.Scientists are searching for a cure for the disease.
Scientists are ____ ____ a cure for the disease.Your question is not the part of our discussion.
Your question does not ____ ____ our discussion.The two countries are warring with each other.
The two countries are ____ ____ with each other.She got nothing in reward for her kindness.
She got nothing ____ ____ ____ her kindness.