_______ in the community than positive changes in social welfare were observed.Đoạn văn6/29Mark the letter A, B, C, or D on your answer sheet to indicate the best answer to each of the following questions. _______ in the community than positive changes in social welfare were observed. Not until volunteer work began No sooner had volunteer work begun Hardly had volunteer work begun No sooner volunteer work had begunGiải thíchB. No sooner had volunteer work begun