Read the following passage and mark the letter A, B, or C to indicate the correct word or phrase that best fits each of the numbered blanks

IV. Read the following passage and mark the letter A, B, or C to indicate the correct word or phrase that best fits each of the numbered blanks.( 1,5pt)
Everyday on radio, on TV, and (23)________ the newspaper, we hear, see or read about many problems in the world, for example, pollution problems.Air (24)________ is the first kind. It mostly comes from fumes released from motorbikes, cars, airplanes, trains and poisonous gases emitted from factories. Also, waste is (25)________ any where, even in the city (26)________ many people are living. The second pollution problem is sea pollution. Many people earn their living from fishing in the sea, and the fish they catch feed many people. But the sea has become so polluted from oil spills and factory wastes that the fish are dying. This is not only killing the fish, (27)________ is also affecting those people who eat fish.Seldom do you find a place nowadays that is not polluted. This problem is growing more (28)________ everyday. We must find a good solution that makes the world a better place to live
23. A.in B. for C. on
24.A.polluted B. pollutant C. pollution
25.A.dumped B. dumping C. to dump
26.A. which B. whom C. where
27.A.and B. but C. so
28. A. difficult B. difficultly C. diddiculty