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—There are days.
⑴ | one two three four five | book/books |
⑵ | one two three four five | desk/desks |
⑶ | one two three four five | girl/girls |
⑷ | one two three four five | teacher/teachers |
⑸ | one two three four five | school/schools |

Liu Xin is a .
She goes to work every night.