Choose the word (a, b, c, or d) that best fits each of the blank spaces.
Hoa is excited about the (21) __ interesting___ activities she is going to do. The Y&Y is having a plan (22)___ to help ___ the community. She'll (23) __participate___ in its recycling program. In joining this program, she'll collect (24) ___used __ paper, glass and empty cans. Then she will send them for (25)___ Recycling___.
She hopes that she could save natural resources and earn some money for her school Y&Y in these (26)___activities ___ . She also thinks about participating in (27)____either _ planting trees and flowers or (28)______ the street children.