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Which of the following sentences is an example of future perfect tense?

A)  I shall write a letter when I have finished my paintings.

B)  You shall have 'been meeting us next week.

C)  You should have redone the house before being able to arrange a worker.

D)  Mrs. Dixit will have been hacking off the dead shoots and twigs of the plants since morning.

E)  None of these