Q
Change into passive voice: They have completed the project.
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A
The project have been completed by them.
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B
The project has completed by them.
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C
The project is completed by them.
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D
The project has been completed by them.
Correct Answer:
D. The project has been completed by them.
Explanation:
Present perfect passive: has/have + been + V3. The verb agrees with the new subject (the project), which is singular.
