Past (i) us in understanding our present world in a (ii) better way. If we know (iii) our ancestors lived or (iv) the wars were waged, we can understand the today’s world (v) and get ideas for a (vi) future, what appears to (vii) as wrong today could have been right (viii). It is also interesting to know how (ix) in the past (x) the life of humans.

A

(i)-help

B

(i)-helps

C

(i)-helped

D

(i)-is helping