题目

I’ve been farming sheep on a hillside for 54 years. I use a small tractor to get about. My dog Don always sits beside me in the passenger scat.One morning I _______ a lost lamb when I was in the top field，near where a motorway cuts through my land. The lamb had become separated from its _______ , so I jumped out of the tractor to _______ it while Don stayed in his scat.Lamb and mother _______ , I turned back to the tractor only to see it move suddenly away from me. This was so _______ because I had put the handbrake on when I jumped out. _______ Don had somehow made the _______move.My hear不等式组的解集是________．