Students arrive at a school in Colombo, Sri Lanka, on Nov. 8, 2021. Academic activities in grades 10, 11, 12 and 13 in all schools across Sri Lanka resumed from Monday. (Photo by Ajith Perera/Xinhua)
Students wearing face masks arrive at a school in Colombo, Sri Lanka, on Nov. 8, 2021. Academic activities in grades 10, 11, 12 and 13 in all schools across Sri Lanka resumed from Monday. (Photo by Ajith Perera/Xinhua)
Students wearing face masks wash their hands before entering a school in Colombo, Sri Lanka, on Nov. 8, 2021. Academic activities in grades 10, 11, 12 and 13 in all schools across Sri Lanka resumed from Monday. (Photo by Ajith Perera/Xinhua)
Students wearing face masks arrive at a school in Colombo, Sri Lanka, on Nov. 8, 2021. Academic activities in grades 10, 11, 12 and 13 in all schools across Sri Lanka resumed from Monday. (Photo by Ajith Perera/Xinhua)
Students wearing face masks arrive at a school in Colombo, Sri Lanka, on Nov. 8, 2021. Academic activities in grades 10, 11, 12 and 13 in all schools across Sri Lanka resumed from Monday. (Photo by Ajith Perera/Xinhua)
