158xxxx7853:It is known to us that the earth travels around the moon once a month. 这是个主语从句,名词性从句。不是强调句。It 是形式主语,that 从句是真正主语。
158xxxx7853:It is known to us that the earth travels around the moon once a month. 这是个主语从句,名词性从句。不是强调句。It 是形式主语,that 从句是真正主语。