I. Chia động từ trong ngoặc theo câu điều kiện loại 1. (Supply the correct form or tense of the verbs in brackets in the conditional sentences type 1.) 1. Our cities _______ (get) cleaner if we _______ (use) public transport more. 2. If the temperature _______ (increase) one degree Celsius, we _______ (face) many problems. 3. Cars of the future _______ (not, use) petrol if batteries _______ (provide) enough energy. 4. If the Earth _______ (get) warmer, the sea _______ (get) warmer. 5. The forests _______ (disappear) if trees are cut down. 6. Huge landmasses _______ (be) under water if the poles _______ (melt). 7. If the deforestation _______ (not, decrease), natural disasters _______ (become) more common. 8. Nuclear waste _______ (be) very dangerous if it is thrown away. 9. If sea levels _______ (rise), there _______ (be) floods around the world. 10. A lot of animals _______ (die) if people _______ (continue) to pollute the environment.