【题目】There are about 200 ______in the world now. ( )
A.countriesB.countryC.countryside
【答案】A
【解析】
句意：现在世界上大约有200个.....。A选项是：国家（复数）；B选项是：国家（单数）；C选项是：乡下。根据句意用国家意思合适，用200修饰，用复数countries。故答案为：A。
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