This is the hospital (a)   my aunt works.

適切な関係副詞だけを考えて書こう。

There was a time (a)   dinosaurs lived on the earth.

適切な関係副詞だけを考えて書こう。

Tell me the reason (a)   you look so happy today.

適切な関係副詞だけを考えて書こう。

That's (a)   he succeeded in business.

適切な関係副詞だけを考えて書こう。