YDS Gramer Soruları – YDS IF CLAUSES TEST 4 (61. Soru)

YDS IF CLAUSES / TEST 4 61. Soru

🏆 Bu Testin Birincisi: missbeliever

Başarı Yüzdeniz : 100 %

61.

- We had better start taking the threat of
global warming seriously ....... .

if we all used environmentallyfriendly
methods of refrigeration

as long as scientists agree on a
solution to the problem

only if we cooperate with other
countries on the issue of public health

because the ozone layer over Europe
has been reduced by two-thirds

as if they were concerned about the
findings of the research

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