.
. Shanghai celebrates ______ one year countdown to the opening of ____ 2010 World Expo on May 1,2009.
| A.the; / | B./; the | C.the; the | D.the; a | 
----Does Liu Hua serve in the army?
 ----No,but he__________in the army for three years.
| A.served | B.has served | C.is serving | D.would serve | 
The boss praised the young man for his hard work, though he ____ experience.
| A.was lack of | B.was lacking in | C.lacks of | D.was lacking of | 
._____ in thought , he almost ran into the car in front of him .
| A.Losing | B.Having lost | C.Lost | D.To lost | 
I'll have you ______ English in six months .
| A.speaking | B.speak | C.spoken | D.be able to speak | 
I posted the letter some time _____ the week .
| A.in | B.during | C.throughout | D.within |