He saw an object falling towards him.It was a pail which landed very close to him中文?

He saw an object falling towards him.It was a pail which landed very close to him中文? He was s_____ when he saw the strange object. a object 还是 an object Object reference not set to an instance of an object. as和who可以这样转换么?原句：He never talked about himself as an object of pity 转换为He never talked about himself who is an object of pity he-----the fire-engine when he saw an accident-----befiore me He saw an interesting film last night（改为一般疑问句）（ ）he ( )an interesting film last night?一空一词 money is not an object翻译 recover an object from the chest depth object object he turned his head and saw an ltalian young man quickly walk past him 中文 他看见外星人从商店里出来了.He saw an alien ______ _______ ________the store saw,old,side,he,an,at,other,man,Then,of,the,road,连词成句 he saw himself as into an unknown world invisible to the eye翻译 he saw himself perhaps as inviting his students to start an exciting voyage to . Object reference not set to an instance of an object.请问, Object reference not set to an instance of an object这句英语是什么意思