Combine each pair of sentences, using the structure “adj+to infi/ that clause”
1. I was very happy. I received your letter this morning.
2. The factory is producing more and more pollution. We are afraid.
3. Using unleaded petrol has a lot of advantages. I’m sure.
4. They burned the plastic waste. It is not good.
5. He didn’t pass the driving test. He was very sad.
6. You have paid attention to recycling. He is delighted.
7. The local authorities will investigate their company about treating waste. They are not pleased.
8. She is very glad. She becomes a member of the group “Friends of the Earth”.
9. He won the first prize in the environmental protection contest. We were surprised.
10. He jumped into the river to save the child. It was brave of him.