do you think it's important to keep in contact with friends you knew as a child?
你认为作为一个孩子同你认识的朋友保持联系是很重要的吗?
as a child:作为一个孩子
do you think it's important：你认为是很重要的?
keep in contact with friends you knew ：跟你认识的朋友保持联系.
keep in contact with 词组,跟...保持联系