When a disaster occurs, all people, ________ they are old or young, rich or poor, try their best to help those in need.
A.no matter | B.whether | C.however | D.even though |
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When a disaster occurs, all people, ________ they are old or young, rich or poor, try their best to help those in need.
A.no matter | B.whether | C.however | D.even though |