Вычеркни лишнее слово thirteen, eighteen, eleven, fifteen/see, three, tree, pen

здесь нужно вставить since or for!

так вот: 1. since 2. for 3. for 4. for 5. since 6. since 7. for 8. since это точно правильно)

-he works in a hospital.   -he is a doctor.

she works at school.   -she is a teacher

-they fly planes.   -they are  pilots

-we are at school.   -we are  students

-i fly rockets. i am a cosmonaut