i have a parents to take care of.（不定式中的of去掉行吗?为什么不能去掉?恳请懂英语的指点迷津.很跪谢.给）

Do you have a pen I want to ( ) a letter to my parents If I have difficulty,I usually go to my parents __ help.A.for B.to.C.get D.by my parents are out and i have a younger brother(to care for)为什么是to care for? I have a problem!I always want to have a pet but my parents refuse it becase they think the pet is noise and it is dirty.but I don't have any friends to play at home so I really want to have a pet.What can I do?How can I say to my parents?Help! I’m going to ________time with my parents this vacation.A.take B.have C.spend D.go i have a parents to take care of.（将句中的of去掉行吗?为什么?恳请老师指点迷津.） I have to babysit my little brother when my parents are a ____.（根据首字母提示完成单词） I'm going to Shanghai next week.Have you anything______to your parents?A to buyB to be boughtC to takeD to be taken my parents expect me to stay at home.as a ---,i regret to tell you that i have to delay our plans I want to surprise my parents （改为同义句）I want to ( ) my parents a ( ) I want to surprise my parents （改为同义句）I want to ( ) my parents a ( ) I have got a watch ______(for ,from)my parents. i have a detached earlobes inherited from my parents. It is sunny day.my parents and i have funIt is sunny day.my parents and i have fun_______in the park.A.play b.to play c.to playing d.in playing My parents have promised to come to see me before I -----for Africa.A.have left B.leave C .left D.will leave My parents have promised to come to see me before I _________ for Africa.A.have left B.leave C.left D.will leave Most parents, I suppose, have had the experience of reading a bedtime story __ their children.Most parents, I suppose, have had the experience of reading a bedtime story ____ their children. 为什么是用to 而不用with i' m going to xi'an next week.have you anything ____ to your parents和另一道题的区别i' m going to xi'an next week.have you anything ____ to your parents?A to buyB to be boughtC to takeD to be taken这道题应该选D,但是这道题和i have