[ Grammar ]
Professor Curie and I worked at that time in the laboratory of the school of Physics and Chemistry where Professor Curie ______ his lectures.
A. is holding
B. was holding
C. to hold
D. held

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a. hall
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Progressive Perfect and Simple Verb Tenses › View
What is the verb tense?
You have entered into a realm filled with magic.
A. Simple Past
B. Progressive Past
C. Perfect Present
D. Perfect Past
