一天高老到超市采购，他把装货的筐子放在货架旁，自己聚精会神地挑选着货物。
B-Time I-Time B-Person I-Person O B-Location I-Location O O O B-Person O O O O B-Thing I-Thing O O B-Thing I-Thing B-Location O B-Person I-Person O O O O O O O O B-Thing I-Thing O