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9. -It’s very important       us to make a plan before a new term. 

-Yes. You must try to make it carefully. 

A. of                    B. for                     C. to 

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8. -Lucy’s skirt is black. What about      ? 

-Mine is white. 

A. you                   B. your                    C. yours   

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7. -What do you think of the cake? 

-I like it very much. It tastes      . 

A. good                  B.terrible                   C. well

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6. -It’s said that you have moved into a new house. 

-Yeah, and we need to buy some       in the mall nearby. 

A. food                  B. furniture                 C. hamburger 

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5. -Must I be in hospital for a week, Doctor?   

-No, you      . You can go back home tomorrow. 

A. mustn’t                  B. needn’t                 C. must 

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4. -My spoken English is poor, what shall I do? 

-Join an English language club to practice, you’ll       it?   

A. be good at              B. drop in                  C. deal with 

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3. -Where is Peter? 

-He       volleyball with his friends in the school gym. 

A. plays                  B. played                   C. is playing 

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2. -How heavily it rained this early morning. 

-Yes. But       of the students in our class was late for school.  

A. some                  B. none                    C. all 

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A)单项选择(共10小题,计10分) 

从A、B、C 3个选项中选出1个能填入所给句子空白处的最佳答案。

1. -Why do you like Mary? 

-Because she is       honest girl.  

A. a                    B. an                      C. the

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21.(09年宁夏理综·12)能正确表示下列反应的例子方程式是

A.向次氯酸钙溶液通入过量CO2:Ca2++2ClO-+CO2+H2O =CaCO3↓+2HClO

B.向次氯酸钙溶液通入SO2:Ca2++2ClO-+SO2+H2O= CaSO3↓+2HClO

C.氢氧化钙溶液与碳酸氢镁溶液反应:HCO3-+Ca2++OH-=CaCO3↓+H2O

D.在氯化亚铁溶液中加入稀硝酸:3Fe2++4H++NO3-=3Fe3++NO↑+2H2O

答案:D

解析:A选项CO2过量的话,应该生成HCO3- 方程式应为:ClO-+CO2+H2O=HClO+HCO3-;B选项HClO可将CaSO3氧化为CaSO4 ,正确的方程式为:Ca2++ClO-+SO2+H2O=CaSO4↓+Cl-+2H+ ;C选项要考虑到Mg(OH)2 为沉淀即可, Mg2++2HCO3-+2Ca2++4OH-=Mg(OH)2↓+2CaCO3↓+2H2O。

[点评]本题考查离子方程式的书写和正误判断,把平时练习中的次氯酸钙与CO2和SO2 反应问题在一个题目中出现,很是少见,四个选项都很常规,都是熟题。难度不大。

22.(09年海南化学·9)在室温时,下列各组中的物质分别与过量NaOH溶液反应,能生成5种盐的是:

A.A12O3、SO2、CO2、SO3           B.C12、A12O3、N2O5、SO3

C.CO2、C12、CaO、SO3                        D.SiO2、N2O5、CO、C12

答案:B

解析:题中的关键词“过量NaOH溶液”,A中只能生成4种盐;B生成5种(NaCl、NaClO、NaAlO2、NaNO3、Na2SO4);C中CaO不能生成盐;D中CO不能成盐。

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