[ Grammar ]
We heard the door slam, but no one was in the living room. Someone …………….. left the house without us noticing.
A. must have
B. might have
C. should have
D. need have
Select your answer:
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Choose the correct form of the verb in Future Perfect tense.
A. They will has completed the project.
B. He will have complete the task.
C. She will have completed her assignment.
D. We will complete our homework.