will they _study at home A：has to B：have to C：must D：can 老师说答案是B,但我认为D也行,为什么是B

will they _study at home A：has to B：have to C：must D：can 老师说答案是B,但我认为D也行,为什么是B Where will they arrive?还是where will they arrive at?为什么? they will leave shanghai at nine tomorrow morning ?( ) ( )will they leave shanghai tomorrow morning They will study in the school or study at They will stay at home () it rains tomorrow. They will study at home.(改为否定句） 上面是model:they will study at home they will stay here at —（little）two weeks they will have problems___(answer) the question at once they,leave,Hongzhou,at,once,for,will(连词成句) they will help us at home,in f____. what will they do at nine fifty?意思是什么?急速! they will arrive_______（in at）the airport soon.they will arrive_______（in at）lanzhou soon.话说这两题好搞啊. They won't go out.They will stay at home.合成一句话 if,they go out ,they will e___ shopping until 10.30at night . They will arrive at our school at eight tomorrow morning.是啥意思 they will stay at home tomorrow按划线部分提问stay at home是划线部分 in no time at all? 什么意思and they will dry in no time at all.