1.go to university
If he passes his exams,he will go to university
If he goes to university, he will study architecture
3.desing an ecological house
If he studies architecture, he will design an ecological house.
4.help protect the environment
If he designs an ecological house, he will help protect the environment____________________________________
If he_helps protect the environment, he'll be happy.__________________________________
1.If we___don't________ look after them.
2.If people throw rubbish in the water,the fish____will_______ die.
3._Cans_________ and plastic bags are dangerous for the animals that________.....
4.If factories __clean_______ the water,the river plants __can________ survive.
5.Agriculture also ___pollute_____ rivers.