下列叙述正确的是
A．在醋酸溶液的 ，将此溶液稀释1倍后，溶液的 ，则 |
B．在滴有酚酞溶液的氨水里，加入 至溶液恰好无色，则此时溶液的 |
C． 盐酸的 ， 盐酸的 |
D．若1mL 的盐酸与100mL 溶液混合后，溶液的 则溶液的 |
The CDs are on sale! Buy one and you get ______ completely free.
| A．other | B．others | C．one | D．ones ks |
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 |
It is often ______ that human beings are naturally equipped to speak.
| A．said | B．to say | C．saying | D．being said |
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 |