Pose les questions correspondant aux réponses suivantes (soit sur la durée, soit sur la frequence).
a) My brother plays tennis three times a month
b) I practise the piano two hours a day.
c) Josh takes lessons twice a week.
d) It takes me half an hour to go to schoo by bus!
e) We invite our frinds once a month, for a dinner party or a barbecue.