AIR POLLUTION, TOGETHER WITH LITTERING, ARE CAUSING MANY PROBLEMS...

88. - 2000 CAU TRAC NGHIEM ANH A B C
2000 CAU TRAC NGHIEM ANH A B C

88. Air pollution, together with littering, are causing many problems in our large,

industrial cities today.

a. with

b. are

c. many

d. in our large

-> b