By the time he reaches the school, the class............

Awill start (B) Too

Bwill be started

Cwill have started

Dwill have been starting

Answer:

The correct sentence would be:

"By the time he reaches the school, the class will have started."

This sentence uses the future perfect tense ("will have started") to show that the action of the class starting will be completed before the future event of him reaching the school.
The future perfect tense is used to talk about something that will happen before a specific time or event in the future.

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