それぞれの動詞の目的語が同一の為、省略可能です。
He has to wash the dishes, rinse the dishes and dry the dishes.
He has to wash, rinse and dry the dishes. ◯
尚、動詞の目的語が同一でない場合は、省略不可です。
He has to go home, do his homework and clean his room. ◯
難易度：5/10
関連リンク：「he likes to eat, drink and talk」と「he likes to eat, to drink and to talk」、どちらが正しいですか？