1) If I am a teacher, I will give homework daily. 2) If we started doing little things, we will be able to solve the biggest problem. 3) If people keep the environment clean, they could help it. 4) If the environment hurt, it would not be beautiful. 5) It will causes harm to animals and fishes, if they eat the trash. 6) If the people do not help the environment, the diseases would increase. 7) If you want to help the environment, you could keep it clean. 8) If I were the principal, I will ban fast food at school. 9) If she is a mother, she will understand me. 10) If all the people doing something to help the environment, we will enjoy living. 11) I think if everyone of us do thing to save the environment, we get a nice one. 12) Schools have an important role to play in children's health. If schools ban junk food, they would help to reduce the problem of childhood obesity. 13) In my opinion, governments should invest more money in public transport. If rail and bus services were more reliable, fewer people would need to drive.

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