To look after the sick boy is my duty为什么要用to?此句的同义句填空：——my duty —— ——after the sick boy.

to look after the The old man needs_______ A being looked after B.look after C.to look after D.looking afterThe old man needs_______ A being looked after B.look after C.to look after D.looking after 说明理由!1 Tom volunteered _______the ducks for the familyA looking after B to look after C looks after Who is going to look after the ___(Green) child. the,hurried,after,she,to,patient,look连词组句 you are kind to look after the old ________ _________of you ______look after the old you are kind to look after the old ________ _________of you ______look after the old the environment is very polluted,so we must itA.look after B.look to C.look for D.look The old man needs _____.A.to look after B.looking after C.being looked after D.looked after The boy is too young to look after himself.(同意句）The boy is___ ___ ___to look after himself. You job will be to look after the children?be后面为什么要加look? The boy is so young that he can't look after himslfThe boy is not___ ____ to look after himself The man needed_,for one of his legs was badly injured.A,to look after B.looking after C.look after D,being looked after look after the collection翻译 look after the baby(中文) the most important for the children is to learn to look after themselves翻译句子 --------is to learn to look after themselves.A.The most important B.The more important I have to go to the hospital to look after my mother.(改为否定句)