Question

ピカチュウ大好き

この問題の答えが①だったのですが、used to がダメな理由を教えて頂きたいです！

aginb ot
) living abroad, for it has been nine years since I left my country.
I(
1 am accustomed to
2 used to
bait oW
③ used to be
accustomed to
00
bomol