Put in said or told 1.my could swim well 2.she her knowledge of french was good. 3.she was reading. 4.the teacher the puples to open the book. и объясните почему

1. Said; 2. Told; 3. Said; 4. Told; say используется, когда человек просто что-то говорит, а tell - когда человек говорит кому-то; сравните: I said I was ready и I told you I was ready