Question

in metro cities pollution level.......down
[went,has gone,had gone,have gone]

Answer 1

Answer:

has

Explanation:

hope it's help❣o(〃＾▽＾〃)o

Answer 2

Answer:

Hello mate , here is your answer

In metro cities the pollution level has gone down

hope this helps you

if it helped you please mark me as brainlist..