常温下，下列各组离子在指定溶液中可能大量共存的是 （ ）
| A．滴人甲基橙显红色的溶液中： Na＋、NO3ˉ、 Iˉ、SO32ˉ |
| B．水电离出的 c（H+）= 10ˉ12 mol/L 的溶液中:K+、 AlO2ˉ、 CH3COOˉ、SiO32ˉ |
C． =10ˉ12的溶液中： K+、ClOˉ、S2ˉ、 Clˉ |
| D．c（Fe 3+） = 0．1 mol/L 的溶液中： K+、ClOˉ 、SO42ˉ、 SCNˉ |
What I need is_____ book that contains ______ABC of oil painting.
| A．a; 不填 | B．the; 不填 | C．the; an | D．a ; the |
Jenny nearly missed the flight______ doing too much shopping.
| A．as a result of | B．on top of | C．in front of | D．in need of |
The CDs are on sale! Buy one and you get ______ completely free. 
| A． | other | B． | others | C． | one | D． | ones |
I’m sure that your letter will get______ attention. They know you’re waiting for the reply. 
| A．continued | B．immediate | C．careful | D．general |
All the dishes in this menu, ______ otherwise stated, will serve two to three people. 
| A．as | B．if | C．though | D．unless |