315 + 315 + ( -315) + ( -15 ) 

= [ 315 + ( -15) ] + [ 315 + ( -315 ) ]

= [ 315 - 15 ] + 0

= 300 + 0

= 300

Community service is............... to help those in your community. It might be something that is done once or on on a regular baisis. Community(1) . . . is oftem referred to as "giving back to you (2). . . ". It can by done by an (3) . . . or an organisation. Community service is gving your time without being (4) . . . , whether it is to help the less fortunate or to help clean up your community

viết lại câu vs nghĩa ko thay đổi
1. He likes doing morning exercise
-> He is...........

Chọn câu trả lời đúng nhất
1. Model making is a wonderful way of.......time alone oee even with other people
A. spend B. spending C. take D. taking
Điền từ vào chỗ trống
1.My father carves eggshell as a............
Chia dạng của từ
1. They opened a shelter to provide housing for the..............(home)

It's not uncommon in America for a person to belong to some kind of volunteer group.(1)___________ one's time and services is very much a part of the American way of life.Most(2)___________activities are organized by churches and group around the nation and event encouraged by government.The (3)___________ hand is extended to the poor,the homeless and the(4)___________
Some people work to teach youngers(5)___________ to read , others open up soup kitchens to(6)___________the homeless, Volunteer also take (7)___________of the disabled bt making reading tapes for the blind and working in orphanages to help children without(8)___________