73. After I _____ lunch, I looked for my bag.

Giải thích chi tiết đáp án:

この文では、過去に別のアクションの前に完了したアクションを説明するために正しい時制を使用する必要があります。英語では、ある時点より前に完了したアクションや過去の別のアクションについて話したいときは、 (past perfect)使用します。

オプションは次のとおりです。
a. had b. had had c. have has d. have had
a. had b. had had c. have has d. have had
a. had b. had had c. have has d. have had
a. had b. had had c. have has d. have had

過去完了の構造に基づいて、「 had 」（助動詞）と「 have 」の第 2 分詞、つまり「 had 」を使用する必要があります。したがって、正しい文は"had had"です。

全文は"After I had had lunch, I looked for my bag."

説明する：
- "After I had had lunch": "Had had" (過去完了) "looked for my bag"アクションが行われる前に昼食が完了していたことを示します。
- "I looked for my bag"ランチアクション終了後に発生するアクションです。

したがって、正解はb. had had.