WELL, IF THEY ARE RIGHT, IT WILL BE TOO LATE BY THE TIME WE WILL...

216. - 2000 CAU TRAC NGHIEM ANH A B C
2000 CAU TRAC NGHIEM ANH A B C

216. Well, if they are right, it will be too late by the time we will find out.

a. if

b. will be

c. by the time

d. will find

--> d