有一个语法知识求助On Sunday I often go to the library （）books为什么写to r

有一个语法知识求助On Sunday I often go to the library （）books为什么写to r On Sundays,I often go to the library _____ books.是to read还是 I always go to the library and read books there on sunday.根据 on sunday ,I often go to my "go to the library and read books"和 " go to the library to r I often go to the park on( )A.a Sunday B.Sunday C.Sundays the family often go to the zoo on sunday mornings. they often go to the __Park on Sunday(child) They often ___(go) to the library. They go to shanghai library to read books this sunday.go to I often go to park on ( )A.a Sunday B.Sunday C.Sundays I go to the park on Sunday.Kitty goes to the park on Sunday.