奎尼酸是制备艾滋病新药二咖啡酰奎尼酸的原料，其结构简式如图，下列有关奎尼酸的说法中正确的是
| A．奎尼酸的分子式是C7H9O6 |
| B．1mol奎尼酸与足量NaOH溶液反应，最多消耗NaOH物质的量为5mol |
| C．1 mol奎尼酸与足量钠反应生成56L氢气 |
| D．奎尼酸能发生消去反应，也能与乙醇、乙酸发生取代反应 |
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 |
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 |