For years，a farmer called John has been devoted to     1     (tackle) the problem of hunger. One day he came across an article which referred to Yuan Longping and his super hybrid rice. He thought it essential    2    him to benefit from the practical knowledge circulated by Yuan Longping. Therefore, he had no alternative but     3     (equip) himself with more knowledge of Yuan’s farming methods. He took all     4     (aspect) into consideration and developed his farming method suitable for the soil of his fields. With scientific farming methods，he and his family have their output     5     (expand) and have never bought exported grain any longer.