Укажите тело отсчета для самолета,который летит

Susan 2) ____(has just/passed) her driving test. Alex 3) _____(has not been writing) for weeks, probably because he 4)_____(has been studying) very hard for his exams. Uncle Tom 5) ____has been building) a shed in the garden. I think it will be ready next month. Mr Brown 6)__.(has not been feeling) well recently. He 7)____ (has visited) the doctor four times this month. The dog 8)_____ (has had) three puppies. Mrs Smith 9)______ (has not/opened) her new shop yet. The decorators10)____ (have been painting) it for weeks. I hope you enjoy the rest of your stay in Australia. 11)___ (Have you /seen) the famous Opera House yet?

Все, относительно чего самолет двигается, например, взлетная полоса (при взлете)