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19.It is a blue bag.(改为复数句子)
Theseare blue bags.

分析 这是一个蓝色的包.
这些是蓝色的包.

解答 答案:are.考查复数句子.is复数are,it复数those"那些.答案是are.

点评 句型转换中的单数句子变复数句子,通常是将每个有复数形式的词全部变为复数.要根据具体语境分析判断.注意一些词复数的特殊变法

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