Question

By the time the guests arrive, we ______ the hall.

• A. decorate
• B. will have decorated
• C. will be decorating
• D. have decorated

Answer 1

Answer:

B. will have decorated

In the sentence:

“By the time the guests arrive, we ______ the hall.”

• The phrase “By the time …” refers to an action that will be completed before a future time.

• For an action completed before another future action, we use the Future Perfect tense.

✅ Future Perfect: will have + past participle

✔️ Correct sentence:
By the time the guests arrive, we will have decorated the hall.