11) often / they /?/riding / How / go / do _How ofter, go the do riding
12) long/bem / you/ there / How /7/ have _How long have there seen you?
13) buys/lot/comics / Who/?/a/ of_Who buys a lot of comics
14) long/they/living/?/ Sydney / How/have/ in / been How long a have they pliving in Sydney 15) should / doing /?/ he/What/stop What should stop he he doing?
il faut corriger les phrases ​