1-C. Palau's flag is similar to Japan's because it features a single circle.Palau's flag is similar to Japan's because it features a single circle.
パラオの旗は、似ています、日本のにダヨ、というのは、それは、単一の円を特徴としているのでダヨ。
2-C. As for movers, there is no single factor that influences their decisions to move to other states.As for movers, there is no single factor that influences their decisions to move to other states.
3-C. They also have the visitors form a single line so that the latecomers do not get served first by chance.They also have the visitors form a single line so that the latecomers do not get served first by chance.
7-C. However, residents agree that Indiana should adopt a single statewide time zone.However, residents agree that Indiana should adopt a single statewide time zone.