Ответ:

3. 1) I have been visiting the sport club for a year.

2) Kids have been eating healthier food since September 2006.

3) She has been studying a lot for the last week

4) Smoking has been banning in public places like restaurants and bars in Scotland since March 2006.

5) The government has been providing free fruit to primary school children since 2004

6) I have been snacking on fruit for the last month

надеюсь что всё правильно