There are no -------[library] in my hometown

复数

There be句型否定句式的构成和含有be动词的其它句型一样，在be后加上“not”。也可用“no”来表示。
即：no + n.（名词）= not a\an\any + n.（名词）。

注意：no + n.（可数名词单数）= not a\an + n.（可数名词单数）；
no + n.（可数名词复数）= not any + n.（可数名词复数）；
no + n.（不可数名词）= not any + n.（不可数名词）。
例如：There is an orange in her bag.
→There isn’t an orange in her bag.
→There is no orange in her bag.

There are some oranges in her bag.
→There aren’t any oranges in her bag.
→There are no oranges in her bag.

There is some juice in the bottle.
→There isn’t any juice in the bottle.
→There is no juice in the bottle.

故答案为libraries

貌似不不对吧，哥哥，应该是There （is） no -------library in my hometown

There are no -library------[library] in my hometown

我们镇上没有图书馆

There are no 【 libraries 】 in my hometown

祝你学习进步,更上一层楼! (*^__^*)
不明白的再问哟,请及时采纳,多谢!