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Question

Difficulty: MediumVerbs, Tenses, and Aspect

Fill in the blank with the grammatically correct verb form to complete the sentence.

Answer:By the time the visiting delegation arrives at the secretariat tomorrow morning, the organizing committee 【will have completed】 all the preliminary arrangements.

Answer

will have completed
The correct verb form is 'will have completed' (future perfect). In English grammar, time clauses introduced by 'by the time' paired with a present tense verb referring to a future moment require the main clause to use the future perfect tense (will + have + past participle) to show that an action will be completed prior to that future moment.

Step-by-Step Solution

1
Identify the temporal marker and clause structure
The sentence contains the time expression 'By the time' followed by a present simple verb ('arrives') indicating a specific future reference point ('tomorrow morning').
The expression 'by the time' sets up a deadline prior to which another action will be completed in the future.
2
Select the appropriate verb tense and aspect
The future perfect tense ('will have completed') is required.
When an action is projected to be finished before a specified point or event in the future, the future perfect aspect (will + have + past participle) must be used.

Key Concept

Future Perfect Tense with Time Clauses (By the time)
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Topics

Verbs, Tenses, and Aspect

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