1.   It seemed that most of them were good at swimming.

2.   When I got to the swimming-pool, there's several children in it, many of them are good at swim, one of them was studying swim, her mother as teacher her .

3.   When I got to he river bank, I found that there was several children swimming in the river.Many of them were good at swimming.

4.   I am good at Chinese, but I don't know she is good at, I can help her .

5.   she isn't good at talking.

6.   she is good at dancing.

7.   They were very good at swimming.

8.   They were almost good at swimming.

9.   But who studied swimming first time or wasn't good at swimming, he must swim in the pool.

10.   This afternoon was very hot, the temperature s about nearly 30.