Humans are polluting the earth day by day, ________, of course, will cause punishment sooner or later.

A. that                         B. it                             C. which                      D. what

Humans are polluting the earth day by day, ________, of course, will cause punishment sooner or later

1. A.
   that
2. B.
   it
3. C.
   which
4. D.
   what

Humans are polluting the earth day by day, ________, of course, will cause punishment sooner or later.

A. that                         B. it                             C. which                      D. what

Humans are polluting the earth day by day, ________, of course, will cause punishment sooner or later.

A. that                         B. it                             C. which                      D. what

Humans are polluting the earth day by day, ________, of course, will cause punishment sooner or later.