Question

What you _____ ( do) tomorrow? I am going to the seaside.

Answer 1

What you are doing tomorrow?I am going to the seaside.

Hope it helps...

Answer 2

Correct question:

What are you _____ ( do) tomorrow? I am going to the seaside.

solution:

What are you doing tomorrow? I am going to the seaside.

• here the present continuous form of [do] will be used.
• this question asks about what plans you already have for tomorrow.
• It's is in the present continuous tense with a future time.

Hence, the correct word to fill in the blank is Doing.

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