非谓语英语单选题WIth his child----- to the care of his parents ,he w

A
with的复合结构做状语,left与his chid 是 谓语和宾语 ,可以这样理解,he leave his child.
即his child was left .
B
The poor studying conditions 是主语,the students are looking forward to_______是修饰poor studying conditions的定语从句,conditions被改善,与improve是被动关系
再问： 被动我明白 但我不懂to哪来的？ 是he leave his child to the care of his parents？能不能把句子说完整一些
再答： look forward to doing sth 这个是固定搭配啊 当然要有to 是的他把儿子扔给他自己的父母照顾 he left his child to the care of his parents and went abroad. 这里left是过去式 不是被动语态 his chid was left to the care of his parents, 这里的left表示被动