[ Grammar ]
The scientist’s findings were considered _____ in the field of biotechnology, prompting further research into the subject.
A. derivative
B. ground-breaking
C. anachronistic
D. peripheral

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Present and Past Perfect Tenses › View
The Perfect Continuous Tenses are also known as _____.
A. Perfect Simple Tenses
B. Perfect Tenses
C. Perfect Progressive Tenses
D. Present, Past and Future Perfect