By the first day of August, 2007, the PLA ________ for eighty years.
#39441
A
founded
B
has founded
C
has been found
D
had been founded
推荐题目
Don’t talk here.  Grandparents ____.
#41785
A
sleep
B
is sleeping
C
are sleeping
D
sleeping
---- Look! Somebody_______ the sofa.---- Well, it wasn't me. I didn't do it.
#39251
A
is cleaning
B
was cleaning
C
has cleaned
D
cleaned
I’m not sure if it _________tomorrow。If it __________ ,we won’t climb the South Hill. 
#37968
A
will snow; snows
B
will snow; will snow
C
snows; snows
D
snows; will snow