Как ответить на на вопрос how often do you play football?

Смотря как часто играешь в футбол. если не часто, то - i do not (often)  play  football. но точнее наверное сказать к примеру  - i  play football once (twice и т. п.) a month (или можно употребить week? year? two weeks и т. п.) 

Как часто ты играешь в футбол?  

you ask me about the sightseeings of moscow.

i think first of all your friend should visit red square. i also think that your friend should visit such sightseengs as the tretyakov gallery, the borodino panorama, christ the savior cathedral, the monument to peter ithe first, the novodevichy convent, manezhnaya square, the arbat.

my favorite sightseeings of moscow are the old arbat, the tretyakov gallery and thepushkinmuseum of fine arts.i hope you will tell us more about your  friend's hobby. what sport does he like? at what age did  he begin to go in for sports? did he take part in any sport competitions?

1. yes, i get up early.2. sometimes it's easy, but sometimes it's so hard.3. the alarm clock wakes me up.4. no,i don't.5. i prefer a cold shower in the morning.6. usually i have scrambled eggs, and a cup of tea  with a sandwich for breakfast.  7. sometimes i watch early news on tv.8. usually i leave house at 7: 45am.9. no, i don't work.10. i need about 10 or 15 minutes to get to my school.11. i go there on foot.