Achieving a high degree of proficiency in English as a foreign language is not a mysterious ________without scientific basis.
| A．process | B．practice |
| C．procedure | D．program |
--- Who__________ it be that is knocking at the door?
--- It ____________ be Father, but I’m not sure.
| A．can; must | B．can; may | C．must; can | D．may; must |
It is the test system, _________ the teachers, that is to blame for the heavy burden of middle school students nowadays in China. 
| A．other than | B．or rather | C．rather than | D．more than |
The last letter ____ arrived yesterday morning left him______ very sad.
| A．which; feel | B．which; to feel | C．that; feeling | D．/; felt |
.The opening ceremony of the 29th Beijing Olympic Games was __________ that everybody was greatly impressed_____ it.
| A．a such big success; at | B．such a big success; on |
| C．a so big success; by | D．so big a success, with |
The peace-keeping Chinese officers are still serving in Haiti ______ the continuous aftershock activities.
| A．in case of | B．in spite of | C．in charge of | D．in favor of |