Units 18-20 » Стр.80 (A)

Choose a or b. 1–b; 2–a; 3–a; 4–b; 5–a; 6–b. 1. If we take a taxi, we'll get there more quickly. 2. If we a. don't prevent water pollution, people's health will be in danger. 3. a. Will you help me if I organize the fundraiser this year? 4. If you are thirsty b. drink some orange juice. 5. If you want to protect the environment, you a. must save energy. 6. What will we do if we b. miss our flight?