Read the following text and decide which answer best fits each numbered blank

III. Read the following text and decide which answer best fits each numbered blank.

        Industrialized countries (1) _____________ worked to reduce levels of sulphur dioxide, smog, and smoke in (2) _____________ to improve people's health. But a result, not predicted until recently, is that (3) _____________ lower sulphur dioxide levels may actually (4) _____________ global warming worse. Just as sulphur dioxide (5) _____________ volcanoes can cool the planet by blocking sunlight, cutting the amount (6) _____________ the compound in the atmosphere lets more sunlight through, warming the Earth. This effect is exaggerated (7) _____________ elevated levels of other greenhouse gases in the atmosphere trap the additional heat.

        Most people agree that to curb global warming, (8) _____________ variety of measures need to be taken. On a (9) _____________ level, driving and flying less, recycling, and conservation reduces a person's "carbon footprint" – the amount of carbon dioxide a person is responsible for (10) _____________ into the atmosphere.

1.     A. has                        B. have                      C. had                        D. having

2.     A. direction               B. demand                 C. instruction            D. order

3.     A. a                           B. an                          C. the                         D. one

4.     A. make                     B. do                         C. go                          D. move

5.     A. in                          B. within                   C. to                          D. from

6.     A. on                         B. of                          C. with                      D. under

7.     A. what                     B. when                     C. which                    D. where

8,     A. a                           B. an                          C. the                         D. one

9.     A. person                  B. people                   C. personal                D. personally

10.   A. to put                    B. put                        C. putting                  D. puts