It's+天气形容词 — 英语填空题

选词填空（每词限用一次）：warm, hot, cool, cold 1. It's summer. It's very ___ today. Let's go swimming. 2. It's autumn. It's ___ today. We ride bikes in the park. 3. It's winter. It's ___ today. We wear big coats. 4. It's spring. It's ___ today. We fly kites in the park.