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正确答案:

(单选题) 17: 第三次作业问题16 A: One week. B: One month. C: Two weeks. D: Two months. 正确答案:

(单选题) 18: 第三次作业问题10 A: Find a large room. B: Sell the old table.

C: Rearrange some furniture. D: Buy two bookshelves. 正确答案:

(单选题) 19: 第三次作业问题2 A: Look for the key. B: Repair the car. C: Paint a shelf. D: Fix a shelf. 正确答案:

(单选题) 20: 第三次作业问题19

A: It takes a longer time to melt. B: It is lighter to carry.

C: It is not so cold as ordinary ice.

D: It is cleaner to use than ordinary ice. 正确答案: