在101kPa和25℃时，热化学方程式：H2(g) + 1/2O2(g) =H2O(g)；△H=-241.8kJ/mol，H2(g) + 1/2O2(g) =H2O(1)；△H=-285.8kJ/mol。下列说法中错误的是： ( )
| A．H2燃烧生成1molH2O(g)时，放出241.8kJ的热量 |
| B．H2的燃烧热为285.8kJ |
| C．O2前面的1/2表示参加反应的O2的物质的量 |
| D．1mol液态水变成水蒸气时吸收44kJ的热量 |
The CDs are on sale! Buy one and you get ______ completely free.
| A．other | B．others | C．one | D．ones ks |
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 |