单项选择题
A.8种 B.4种 C.7种 D.6种
A.阳光充足 B.已经开始 C.调查研究 D.工人和农民
A.性 B.数 C.格 D.体
A.He am a studentes B.She is a students C.I were a student D.You are a student
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