Carbon emissions from airplanes and other pollutants ________ to global warming. A. contribute B. stem C. attribute D. spark
SECTION II: LEXICO – GRAMMAR
Part 1: Questions from 16 to 35
Choose the best answer from A, B, C or D to best complete the following sentences.
Carbon emissions from airplanes and other pollutants ________ to global warming.
A. contribute
B. stem
C. attribute
D. spark