先通读下面的短文，掌握其大意，然后从A、B、C、D四个选项中选择可以填入空白处的最佳答案。

    Fourteen-year-old Emma Peters is talking about her coming summer holidays．

    "Soon it will be the summer holidays again．I'm not going away with my parents this year but I don't1．I'm going to2my time with two of my classmates，Bella and Lou．

    We've just started a band (乐队)．We call it Sunshine．I play the guitar(吉他)and sing．Bella plays the piano and Lou plays the drums．We 3in Lou's dad's garage(车厍)and we also play in small coffee shops．We're 4 very good friends．We love and help each other．I was in a different band last year but that wasn't so much5.No one wanted to practise．

    "We've written several songs and we have our own website (网站)．Over the summer holidays we are going to make a CD 6ten or maybe twelve songs on it．We're not quite sure yet．We haven't finished writing all the songs，7 we've decided on the name of the CD．We're going to call it The Red Room．The CD may not make8famous，but that doesn't matter—we just enjoy our music and hope to 9it with other people．I can't think of a better10to spend the summer holidays．”

如图回答问题：

为了能及时以现煤气泄漏，常在煤气中加入少量有特殊气味的乙硫醇（C₂H₅SH），乙硫醇燃烧 的化学方程式为2C₂H₅SH+9O₂xCO₂+2Y+6H₂O，已知Y由两种元素组成，则x=____，Y的化学式为____．