the happy _____ of children playing in the park, I’m full of joy and confidencein the future of our country.

_ we left the building that I realized how dangerous the situation had been

31. We should think of ways to stop the waste from the factory _____ our living environment.

They clapped and shouted______ when they saw YaoMing appear on the playground.

He is a _______ player and he plays ________.