547.　 stand in (a) line 站队，排队

546.　 stand up 站起，起立

545.　 sth. happen to sb. 某事发生在某人身上

544.　 spend time with families 和家人共度时光

543.　 spend time in doing sth/on sth. 在…上花费时间

542.　 spend money on sth(in)doing sth.花...钱在某事上(做某事)

541.　 speak highly of 高度赞扬

540.　 speak to sb. 与…讲话

539.　 something wrong with 出了毛病

538.　 some day 未来的某日