一道英语选择题The moon travels around the earth once every month,__is kn_英语解答

一道英语选择题The moon travels around the earth once every month,__is known to everyone.
as用于从句是被动的句子中which用于从句是主动的句子中 which 不能用于句首有这种说法吗

人气：342 ℃　时间：2019-09-29 03:51:43

解答

which本句也可以用,是非限制性定语从句.但as本句当然也已使用.
因此,本句which,as兼可.
which不可以用于句首,但是若要选一个则选as,因为一般说as is known to everyone,as is known to all等等.
回答完毕.