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---SUMMER VACATIONS, THE STUDENTS VOLUNTARILY GO A...
---SUMMER VACATIONS, THE STUDENTS VOLUNTARILY GO AND WORK IN REMOTE...
KIEM TRA 45NO2GRADE 11
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10.---summer vacations, the students voluntarily go and work in remote or mountainous areas to provide education for children. A. At B. Of C. By D. During
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10.
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KIEM TRA 45NO2GRADE 11