if you have been reading the novel for two weeks,it's about

这是固定用法it's time sb did sth。
比如你该上床了
It's time you went to bed。
本来意思是现在你本来应该在床上了,怎么你还在这里?赶紧上床去。
用成习惯了所以变成it's time sb did sth。
也可以说it's time for sb to do sth。
但是题目中you前没有for,所以填came
意思是,你读这本小说都读了两星期了,应该快读完了吧。