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Here's how you can complete the sentences: 1. If it rains, we **won't go** out. 2. It’s cold! I **will turn** on the heating. 3. If the weather **is** good, we’ll go on a picnic. 4. You can ask John that question when he **comes**. 5. I think Manchester **will win** the match. 6. Maybe I **will become** a writer when I grow up. 7. If I **hear** anything about the accident, I’ll let you know. 8. He always **locks** the door when he leaves for work.