YDS PHRASAL VERBS / TEST 25 20. Soru

Bu Testin Birincisi Meryemp

100 %

20.

- Mario Molina was one of a small group
of scientists who discovered the harmful
effects ........ certain man-made chemical
compounds ....... the Earth's ozone layer.

with/to

by/about

from /in

of /on

for/by

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