15 ! present perfect continuous 1) andrew in the country (not/ to live) 2) how long your this car? ( to drive) 3) they ( not/ to cycle) 4) this book, but mary has( not/ to read) 5) how for her? ( to wait) on the blue car? ( to work) 7) my hard enought. ( not/ to study) 8)how long for a flat? ( to look) 9) i my homework( not/ to do)

Странное задание) Некоторые предложения вернее будет употребить в другом времени, поэтому я написала так, как у Вас требуется в задании, ну а более правильный на мой взгляд вариант ответа я укажу в скобках.
1) Andrew hasn't been living in the country (has not lived) 
2) How long have your grandparents been driving this car?  
3) They haven't been cycling. ( have not cycled)
4) Tony hasn't been reading this book, but Mary has( has not read)
5) How long has he been waiting for her? 
6) Has Andy been working on the blue car? ( has... worked)
7) My brother has not been studying hard enough. ( has not studied)
8) How long have they been looking for a flat? 
9) I have not been doing my homework( have not done)