题目

阅读下面的材料，在空白处填入适当内容（ 1个单词）或括号内单词的正确形式（ 1个或几个单词），使句子通顺正确。 1 ． - Can you play _____ violin? - No, I can’t.2 ． - Where are the _____ (key)? - They are on the table.3 ． - _____ you ever been to the space museum? - No, I haven’t4 ． We should spend more time _____ our study.5 ． Can you talk to _____ (they) and play games with them?6 ． - Do you know _____ the bookstore closes today? - I think it closes at 7: 00 p.m. today.7 ． There _____ (be) a lot of rain here every year.8 把质量为mg的铜丝灼烧变黑，立即放入下列物质中，能使铜丝变红而且质量仍为mg的是A．NaOH溶液 B．CH3COOH C．稀HNO3 D．CH3CH2OH