From tomorrow, parents can monitor the outdoor weather forecast in Hanoi (20) If the temperature (21) VTV 1. 10°C or higher, students will go to school on normal schedule. if the temperature is below 10°C, students will study 30 minutes later. 08.30 starts the first period during the cold spell. During this time, the school respectfully hopes that parents will regularly update notices from the school and homeroom teachers on the class group to ensure the health of children's (22) Question 20 A. in Question 21. A. is B. on B. are C. at C. was 1 D. with D. were