室温下，下列各组离子能大量共存的是
| A．稀硫酸中：K＋、Mg2＋、AlO2-、S2O32- |
| B．Na2S溶液中：SO42-、K＋、Cl－、Cu2＋ |
| C．Kw/c（H＋）=10-13溶液中：Fe3＋、NH4＋ 、Mg2＋、SO42- |
| D．通人大量CO2的溶液中：Na＋、ClO－、CH3COO－、HCO3- |
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 |
The children loved their day trip, and they enjoyed the horse ride ______.
| A．most | B．more | C．less | D．little |
Progress______ so far very good and we are sure that the work will be finished on time.
| A．was | B．had been | C．has been | D．will be |
Charles was alone at home, with_______ looking after him.
| A．someone | B．anyone | C．not one | D．no one |