1.He is delighted that you are interested in protecting environment.
2.They are very happy that they could save money from reused things. 3.My teacher feels pleased that we won the first prize in collecting cans.
4.We are worried that the rivers are becoming heavily polluted. 5.I am glad that Thế Y & Y is having a plan on recycling used paper. 6.She is not pleased that she must emply the kitchen garbage. 7.My parents are very happy that I passed all the exams. 8.I was very happy that I received your letter this morning.