英语Things are known ______ when they unite with the oxygen of the air.A.to burnB.burnC.burningD.being burning 为什么
问题描述：
英语Things are known ______ when they unite with the oxygen of the air.
A.to burn
B.burn
C.burning
D.being burning
为什么
答
答案是A.something is known to do something.是英语中常见的巨型,表示“大家都知道.”.这个句型可以改成：It is known that something ...所以,这句话可以改成：It is known that things can burn when they unite ...