there are books ——many different sudjects in the library at/ on/ _英语解答

there are books ——many different sudjects in the library at/ on/ for /from解析

人气：406 ℃　时间：2019-10-19 07:38:43

解答

on
on one's subject 有关哪门课的书
图书馆里有很多不同课目的书.