おみせ

その たかい かばんを、どこ の おみせ で かいましたか。

The correct answer for the `★` position is `おみせ` (omise), meaning "store." It forms `どこのおみせで` (at which store) with `どこの` and the location particle `で`, asking "Where did you buy that expensive bag?". `どこ` (where) is an interrogative pronoun and should precede `の`. `の` is a particle used here to connect `どこ` and `おみせ`, meaning "which store's." `で` is the location particle marking where the action of buying occurred, and should follow `おみせ`. *Grammar Tip:* To ask "at which [place]," use the structure: `どこの` + [place noun] + `で` + [verb]? Example: どこのレストランでたべましたか (At which restaurant did you eat?).

正解(せいかい)は「おみせ」。「どこのおみせで」で場所(ばしょ)を質問(しつもん)。「どこ」は「の」の前(まえ)。「の」は助詞(じょし)。「で」は場所(ばしょ)を表(あらわ)す助詞(じょし)で「おみせ」の後(あと)。 文法(ぶんぽう)：「どこの～で」で場所(ばしょ)を尋(たず)ねる。