Tính B = 1 + 2 + 3 + ... + 98 + 99

giải zùm thanks you!!!✿✿❤

Read the text and Choose the best answer
The first(30)__ why many families do volunteer work (31)__ that they feel satisfied and
proud. The feeling of fulfillment(32)___ from helping the community and other people.
In addition, volunteering is a great way for families(33)__ fun and closer. But many
people (34)___they don’t have time to volunteer because they have to work and
(35)___ care of their families. If that’s the case, try rethinking some of your free time as
a family. You could select just one (36)___ two projects a year and make them a family
tradition. For instance, your family can (37)___ and (38)___ gift blankets for the old
homeless people on holidays. Your family can also (39)___ only one Saturday
morning a month collecting (40)_____ in your neighborhood.
30. A. reason B.question C. answer D.request
31. A. so B.do C.calls D. is
32. A. takes B. comes C. is D.gets
33. A. to do B.to make C. to get D. to have
34. A.tell B.speak C. say D.ask
35. A. take B.bring C.grow D.look
36. A. and B. or C. but D. with
37. A. help B.do C. make D.have
38. A. donate B. help C.give D.make

39. A. have B.do C.take D. spend
40. A.stamps B. rubbish C.books D.money