三道高考英语单选题 求详解The new idea ＿ first in Japan has been＿to other

三道高考英语单选题 求详解
The new idea ＿ first in Japan has been＿to other parts of the world.
A carried out;brought out B having been carried out;brought about
C carried out;brought over D having been carried out;brought in
为什么不选D
Would you please do me a favor to post the letter?
＿＿＿＿＿＿＿＿＿＿＿＿
A You are welcome.B It's my pleasure.
C With pleasure.D No,I can't
为什么不选B
You ＿ the burning sun and heavy rain if you want to see the wild world.
A are exposed to B expose
C being exposed D are being exposed to
为什么不选D
第一题答案是C
第二题答案是C
第三题答案是A