English Language · English
Identify the grammatical error and rectify the given sentence by choosing the correct option. 'By the time the committee reached the laboratory, the researchers conduct several complex experiments to validate their hypothesis.'
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 1By the time the committee reached the laboratory, the researchers had conducted several complex experiments to validate their hypothesis.✓
- 2By the time the committee reached the laboratory, the researchers was conducting several complex experiments to validate their hypothesis.
- 3By the time the committee reached the laboratory, the researchers conducted several complex experiments to validate their hypothesis.
- 4By the time the committee reached the laboratory, the researchers had been conducting several complex experiments to validate their hypothesis.
Correct answer
By the time the committee reached the laboratory, the researchers had conducted several complex experiments to validate their hypothesis.
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