He spent a lot of time working for human rights and progress这里的working是非谓语,作什么成分?为什么不用to work?

He spent a lot of time____about engines(发动机）. He _______ a lot of time on research ______ agriculture.A spent into B spent of He spent a lot of time playing with his pei dog (对 a lot of 提问) He spent a lot of time ------all kinds of ball games .填play的什么形式 He also spent a lot of time surfing the Lnternet for i____然后填什么啊? He spent a lot of time watching TV or playing computer games.改为同义句 He spent _____time on his homework that he made a lot of mistakes A.such little B.so little He spent a lot of time ------all kinds of ball games .（play）填play的什么形式 按词组适当形式填空My father likes collecting stamps,he is____on them(spend a lot of money)答案是spent a lot of money,为什么? He spent a lot of time _ _ with friends.他花了大量时间和朋友喝酒. he spent a lot of time_______(搜索) information about the cloned sheep last night填什么?两个空 She spent a lot of time and money ____ them I spent a lot of time learning dancing同义句 edison spent a lot of time ___the experiment He has a lot of A lot of his money was spent helping others.还是had been spent? Though we spent a lot ,we think it____because we .Aworth Bworth being spent Cworthy of Dworthwhile He ___a lot of time explaining the reason___the people A spent,to B took,to C spent,for D took,fort我知道是用spent,但是后面的就不清楚,,还是用for