Respuesta :

NgShiYin

Answer:

b) use to

Explanation:

This is because at the beginning of the sentence there is already a past tense "did" so the verb after that would have to be in base form which would be "use to". It's a rule so I can't really explain much.

Answer:

use to

Explanation:

The auxiliary verb (did) is marked for past tense, but the main verb (use) is not cuz it's supposed to appear in it's base form

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