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  3. The walls are made of hollow concrete blocks.A big B long C new D empty

The walls are made of hollow concrete blocks.A big B long C new D empty

admin2020-12-24  32
问题 The walls are made of hollow concrete blocks.
选项 A big
B long
C new
D empty
答案D
解析hollow 是“空心的”意思，如：a hollow tree, a hollow pipe。这里可以用empty 来替换。
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