( ) 31. Mr. Jiang, as ______ elderly man, took part in the Special Games for ____ elderly.
A. a; the B. an; the C. an; an D. the; an
( ) 32. is necessary ______ you ______start training a few months before the walk.
A. This , for , / B. It , for, / C. That, of , to D. It , for, to
( ) 33. When all his money ____________, he had to return home.
A. ran out B. has run out C. was run out D. were run out