It was with great joy _____ he received the news that his lost daughter had been found. [ ]

Thanks to the joint efforts made by the leaders of China and the US over recent years, mutually _________ Sino-US relations have made remarkable progress.

My mother was over the age limit and ________, her application for the job was refused.

What’s this _____ English— It’s ____ apple.

下列各句中，加点的成语使用恰当的一句是 （ ）