[ Grammar ]
Scientists finally …….. find a cure for the disease after years of research.
A. managed to
B. can
C. could
Select your answer:
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Present Perfect and Past Simple › View‘For 20 years’ is a signal word for the ..
A. past simple
B. present perfect
Vocabulary › View
What is the closest meaning of controversy?
A. Disagreement
B. Harmony
C. Consensus
D. Conformity