Question

All people,    they are old or young，rich or poor，have been trying their best to help those in need since the disaster
A even if    B whether    C no matter   D however

Answer 1

B。

考查固定措配whether……or……的用法，句意：自從那次災(zāi)難以后，所有的人，不論老人還是年輕人、富人還是窮人，都在努力幫助那些需要幫助的人。