________8：00 of August 8, 2008, Beijing will hold the 29th Olympic Games．

(   )8.We can buy the fresh fruits ________.
A. in Marsha s house                  B. in Wawa Village
C. in Country Life Market             D. in Next Wave Music Store
(   )9. Mr. Green is planning to have a half-year holiday in California, but he can’t leave his pet dog     alone, he should call ________for help.
A. 543-002       B. 544-996        C. 543-616        D. 544-471
(   )10. According to the four ads, which is true?
A. Wawa Village is open only at night.        
B. Marsha’s House does not offer food,
C. Country Life Market is newly opened.     
D. Next Wave Music Store sells presents.

(8分)（1）（4分）實(shí)驗(yàn)室在臨時(shí)配制一些氯化鐵溶液時(shí)，常將氯化鐵固體先溶于較濃的鹽酸中，然后再用蒸餾水稀釋到所需的濃度，是為了                。氯化鐵水溶液呈     性，原因是（用離子方程式表示）：                       。
（2）（2分）物質(zhì)的量濃度均為0.1 mol/L的下列溶液pH 由大到小的順序            
          （用序號表示）
①CH₃COOH  ②NH₄Cl       ③NaHCO₃    ④Ba(OH)₂      ⑤NaOH    ⑥N a₂CO₃
(3)（2分）物質(zhì)的量濃度相同的下列溶液按c(CO₃^2－)由大到小的順序是____________
①Na₂CO₃    ②NaHCO₃  ③H₂CO₃   ④ (NH₄)₂CO₃ ⑤NH₄HCO₃

(8分)計(jì)算：