Have you ever littered _________ things.(填上介词或副词)

Have you ever littered _________ things.(填上介词或副词) -Have you ever flown ____ an airplane?-No,never.（填介词或副词） It,s time( )have our Engglish class.填上副词或介词 they usually have a rest ( ) lunch 填介词或副词 what can you do__ the weekend(填介词或副词 We are students.What you?填介词或副词 填介词或副词1.you look smart ()this suit. 新概念 根据上下文填上正确的介词或副词 根据上下文填上正确的介词或副词 填副词或介词Where is Tom _________?Canada.There workers are workin 填上适当的介词或副词：I will be allowd to have Mongday _____ to go home 用适当的介词或副词填 用适当的介词或副词填空,补全句子 1.I'm afraid _________