Topics: Past Tenses
The scientist ___ several groundbreaking experiments before receiving recognition.
A. conducts
B. conducted
C. had conducted
D. had been conducting
Select your answer:
Random Topics:
Grammar - Future ActionVerb Tenses and Subject Verb AgreementPrepositions and Phrasal VerbsVerb + PrepositionPresent Simple vs Past SimpleSubject Verb Agreement & Subjunctive MoodModal Verb in Passive VoiceUsed toGerund & InfinitiveModal SpeculationOther quiz:
Grammar › Viewour homework ___________ yesterday
A. is done
B. were done
C. was done
D. has been done
Phrasal Verb › View
you shouldn’t __________ too many duties
A. take on
B. take over
C. take in
D. take up