There's no way of knowing why one man makes an important discovery________another man，also intelligent，fails.
| A．since | B．if | C．as | D．while |
----What ______ do you focus on when choosing a mobile phone for personal use?
----Its functions and stand-by time.
| A．features | B．signs | C．symbols | D．Brands |
第二节：单项填空(共15小题；每小题1分，满分15分)
______ strong and powerful China will certainly benefit ______ whole world.
| A．A; a | B．The; a | C．The; the | D．A; the |
35. Sales of CDs have greatly increased since the early 1990s, when people_____ to enjoy the advantages of this new technology.
| A．begin | B．began | C．have begun | D．had begun |
34. ________ is often the case, we have worked out the production plan.
| A．Which | B．When | C．What | D．As |
33. A man is being questioned in relation to the ________ murder last night.
| A．advised | B．attended | C．attempted | D．Admitted |