1. (2019四下·微山期中) 读一读. 选择合适的单词补全句子

second   go to school   teachers' desk   first   computer

1. （1） Our classroom is on the floor.

   

   Our library is on the the floor.

   

3. （2） It's 7:30 a.m. It's time to .

   

5. （3） The is on the .