The best time to go to Sanya is in winter.(对划线部分提

Question

The best time to go to Sanya is in winter.(对划线部分提问)
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( ) ( ) the best time to go to Sanya?

There will be hundreds of people in the park.(对划线部分提问)
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( ) ( ) people ( ) there ( ) in the park?

The activity will be in the school hall at 3:00.(对划线部分提问)
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( ) and ( ) will the activity be ?

I answered his letter last Sunday.(改为同义句)
I ( ) ( ) his letter last Sunday.

Answer 1

( when) ( is) the best time to go to Sanya?

(How) (many) people( will) there ( be) in the park?

( when) and ( where) will the activity be?

I ( responded) ( to) his letter last Sunday.