小题1:If you take some ___________ after supper, you will be thinner. (exercise )

小题2:I have a good ___________ habit, so I’m very healthy.   ( eat )

小题3:They have been to many ______________ countries.  ( west )

小题4:Would you like _______________ to my party? ( come )

小题5:My classmate goes to the movies______________ a week.  ( two )

小题6:Here _____________ some books for you.  ( be )

小题7:When did you finish ___________ your first movie, Tom? ( make )

小题8:I’m sorry ____________ that you didn’t pass the exam.  (hear)

小题9:Mary ________to have the piano lesson every week .  ( have )

小题10:Dumplings are ______________Chinese food.  ( tradition )

（12分）现有失去标签的氯化钙,硝酸银,盐酸,碳酸钠四种无色溶液,为了确定四种溶液各是什么,将它们随意编号上A.B.C.D后,产生的现象如下表所示:

	实验内容	实验现象
(1)	A+B	没有现象发生
(2)	B+D	有气体放出
(3)	B+C	有沉淀生成
(4)	A+D	有沉淀生成

(1)写出A.B.C.D溶液中溶质的化学式:

A______    B_______     C_____      D______

(2)写出上述实验中有关反应的离子方程式

实验(2) B+D ___________________      

实验(3) B+C __________________