【Usinghishybridrice，farmersareproducingharvests___asbefore．用他的杂交水稻种子，农民种出的粮食是以前的两倍．】

　　Using his hybrid rice，farmers are producing harvests___ as before．

　　用他的杂交水稻种子，农民种出的粮食是以前的两倍．