It's getting colder.None of us has caught a cold,___ A.either B.though C.so D.even

问题描述:

It's getting colder.None of us has caught a cold,___ A.either B.though C.so D.even

应该选择B
though 是个副词,意思是 然而,但是,虽然;尽管(一般放在句尾).
翻译成:虽然变冷了,但我们谁也没有感冒.