1. liquid, c. in a form of a substance that flows freely and is not a solid or a gas., 2. gravity, d. the force that causes something to fall to the ground., 3. habitable, a. suitable for people to live in, 4. promising , e. showing signs of being good or successful, 5. traces, b. marks, opjects, or signs that show that somebody or something existed.

task 2.3

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恢復自動保存: ?