Read the following announcement and mark the letter A, B, C, or D on your answer sheet to indicate the correct word or phrase that best fits each of the blanks.

Community Clean-up Day Announcement

Dear students,

Our school will organize a Community Clean-up Day this Saturday to improve students' responsibility of environmental protection. All participants are encouraged to bring (20) reusable water bottles and gloves to help reduce waste and keep the area clean.

The event will include several activities such as collecting litter, planting trees, and sharing useful ideas on how to live a more environmentally friendly lifestyle. These activities are designed to be both educational and (21) so that students can learn while enjoying the experience.

The program will take place (22) the school playground from 7:00 a.m. to 10:00 a.m. All students and teachers are warmly invited to participate.

Let's join hands to make our community cleaner and greener!