Напишите вопросы. используйте present perfect progressive. 1)how long (do) these exercises ? 2)since when you (paint) this picture ? 3) how long she (wait) for her lunch ? 4) since when they (grow) these plants ? 5)how long she (stay) at this hotel ?

How long have you been doing... Since when have you been painting.. How long has she been waiting... Since when have they been growing... How long has she been staying...