years ago they knew many things about the moon.

years ago they knew many things about the moon.
they knew how big it was and how far it was from the earth.中的it was 放在how big ,how far

写成特殊疑问句为：How big was it?How far was it from the earth?
写成陈述语序的宾语从句为：how big it was 就是说how big其到了引导从句的作用,主语it要放在表语was的前面；而How far was it from the earth?也是同样的道理.

如以上回答内容为低俗、色情、不良、暴力、侵权、涉及违法等信息，可以点下面链接进行举报！

点此我要举报以上问答信息