[ Grammar ]
Most climate scientists agree the main cause of the current global warming trend is human expansion of the greenhouse _______.
A. causes
B. effect
C. gas
D. damage
Select your answer:
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Grammar › ViewBig
A. Pronoun
B. Verb
C. Noun
D. Adjective
E. Adverb
Past Tenses › View
I was over the moon (very happy) after I ……………………………. my thesis.
A. was completed
B. had completed
C. was completing
D. had completing