题目

选用方框中所给单词的适当形式填空。 skate her century rabbit theyskate her century rabbit they 【1】-- How long did Qing dynasty rule (统治) over China? --Over two___________and a half.【2】Don't worry about her. She is old enough to think for_________ .【3】—Is this your parents’ room?—— No，it’s mine. _______ is on the ground floor.【4】____________on the ice is a popular outdoor activity in the north of China.【5】Some of the ____________ names are interesting and are easy to remember..关于下列实验的叙述中正确的是A.溴乙烷在浓硫酸作用下加热可制得乙烯B.在制备乙酸乙酯实验中，长导管有冷凝蒸汽和导气的作用，饱和碳酸钠溶液液面上有油状并有香味液体生成C.实验室可用无水乙醇和过量的3mol/L硫酸的混合液制乙烯D.用电石和水可制得纯净的乙炔