1.On their ___from their trip ,the father asked his son."How

1.B.return n.返回
2.可能是A,但不知所云,they指什么?请检查一下原题.
找到了：One day,a father of a very wealthy family took his son on a trip to the country with the firm purpose of showing his son how poor people live.They spent a couple of days and nights on the farm of what would be considered a very poor family.On their return from their trip,the father asked his son,“How was the trip?”
“It was great,Dad.”
“Did you see how poor people live?” the father asked.
“Oh yeah,” said the son.
“So,tell me,what did you learn from the trip?” asked the father.
The son answered,“I saw that we have one dog and they had four.We have a pool that reaches to the middle of our garden,and they have a creek that has no end.We have imported lanterns in our garden,and they have the stars at night.Our patio reaches to the front yard,and they have the whole horizon.We have a small piece of land to live on,and they have fields that go beyond our sight.We have servants who serve us,but they serve others.We buy our food,but they grow theirs.We have walls around our property to protect us; they have friends to protect them.”
The boy’s father was speechless.
Then his son added,“Thanks,Dad,for showing me how poor we are.”

B, B

第一道题选C 分析：On是介词后须跟动词ing形式。
第二道题选B 分析;该题考查“动、介词搭配问题Reach后直接加地点：get加to 加地点
arrive加in 或at(in后跟大地点，at后跟小地点）

1、B arrive 后接at、in 、on
return from 从......回来
reach 后无介词
come from 来自
2、A reach to 通往 延伸
get to 到达 接触到
arrive 后不接to
flow to 流至 流向