If tourists ______ the environment, local people will welcome them., A. respected, B. respect, C. will respect, D. would respect, If we ______ more trees, animals will have better habitats., A. planted, B. plant, C. would plant, D. will plant, If people ______ less plastic, the environment would be cleaner, A. use, B. used, C. will use, D Would use, If I ______ enough money, I would travel around the Mekong Delta., A. have, B. had, C. will have, D. would have, If she ______ an eco-tour guide, she would teach visitors about wildlife., A. is, B. was, C. were, D. will be, If we ______ near a national park, we would visit it every weekend, A. live, B. lived, C. will live, D. would live

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