2009年9月25日，我国成功发射“神舟七号”载人飞船。飞船以铝粉与高氯酸铵的混合物为固体燃料，其中高氯酸铵的反应为：2NH4ClO4 N2↑＋C
l2↑＋2O2↑＋4H2O。下列有关叙述正确的是
| A．该反应属于分解反应，也属于氧化还原反应 |
| B．在反应中NH4ClO4仅起到氧化剂作用 |
| C．铝粉的作用是点燃时可以置换出氧气 |
| D．上述反应瞬间能产生高温，高温是推动飞船飞行的主要因素 |
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 |
The children loved their day trip, and they enjoyed the horse ride ______.
| A．most | B．more | C．less | D．little |