Ис объяснением, ! "i very long," said florence. "when __ i __ here? yesterday? ".

a) slept / was / coming

b) slept/ have / been coming

c) have slept / have / come

d) have slept / did / come

D) have slept / did / come

Объяснение:

"I have slept very long," said Florence. - используем Present Perfect для обозначения действия, которое началось в и завершилось к моменту речи.

When did I come here? - в вопросе спрашивается про конкретный момент  в когда произошло действие, поэтому нужно употребить Past Simple.