todo和ingChinaisthethirdcountryitsastronautsintospaceA.SendingB.Tosend-----请说明答案,以及原因和相关的语法知识.说明知识的时候最好有例句.－－请勿抄袭,

Question

to do 和ing
China is the third country_____ its astronauts into space
A.Sending
B.To send
-----
请说明答案,以及原因和相关的语法知识.
说明知识的时候最好有例句.
－－
请勿抄袭,

Answer 1

B
这种表达是固定搭配,sb is the 1st/2nd/3rd...to do something,表示某人或者某事是首次/第二个/第三个……做……的人/事.
如：
He is the first one to get married in our class.