— I tried it out in this way but I failed.— Why not it in some other ways?A. to work; try

问题补充：

— I tried it out in this way, but I failed.

— Why not it in some other ways?

A. to work; try doing

B. to work; try to do

C. working; try to do

D. to work; to try doing

答案：

(答案→)A. to work; try doing

B. to work; try to do

C. working; try to do

D. to work; to try doing

解析：try to do sth，表示努力做某事，而try doing sth，表示试着做某事，同时why not do sth，表示为什么不做某事，根据本题的用意，可知答案为A。