来凤县翔凤镇2017:a series of books 后面加is 还是 are？

a series of books 后面加is 还是 are？ a series of 什么意思? 是否可以说a suit of books? a series of 后跟单数还是复数 We can learn about Chinese history from books. A a lot of B lots of My uncle has a lot of books but most of ____are covered with dust. A lot of new books are on s________in the bood store The books（ ）every inch floor space. They took up a lot of（ ） 帮我解释一下这道题： He has a large collection of books _______are written in English. a lot of后面接什么词性？