Answers:

   `3.` Tom's parents are very sad because he studied bad every semester.

   `4.` My brother likes playing sports, especially soccer and swim.

   `7.` She had to do the house work all day after her mother died.

   `8.` She is delighted that her parents will give her a birthday present.

   `9.` Nam always spends his free time playing football.

   `13.` TV is bringing not only information but also entertainment.

   `15.` Mrs. Lan is talking my mother at the moment.

3.Tom’s parents are very sad because he studied very bad every semester

4.My brother likes playing sports especially swim and soccer

7.She had to do the housework all day after her mother died

8.She is delighted that her parents will give her a birthday present

9.Nam always spends his free time playing soccer

13.TV is not only entertainment but also bringing information

15.Mrs.Lan is talking to my mother at the moment