その他の回答(1件)

1

>>if children uses smartphones too much (1) If children use smartphones too much (2) If children are allowed to use smartphones too much (3) If children are allowed to use their smartphones too much (4) If children use their smartphones too much 上の4つのいずれでもいいですが、(3) が最も適切だと思います。

1人がナイス!しています