1. Discovery Channel makes funny education for children all over the world

2. Although Peter likes sports so much, he doesn't have time to  play or watch them

3. In the summer, we go swimming with my friends at weekend., and in the winter, we often go ice skating  

4. Mai and her brother have learned English for four years

5. That boy is the most intelligent in our class

1) Discovery Channel makes funny education for children all over the word.

2) Although Peter liked sports, he didn't have much time to watch them.

3) At the weekend, we go swimming in the summer and ice skating with my friends in the winter.

4) My and her brother have learnt / learned English for four years.

5) That boy is the most inteligent boy in our class.