Ⅱ. 用合适的介词或副词填空
【小题1】Don't take food ______ the library.
【小题2】You should check ______ ______ the main gate.
【小题3】You should wear a hard hat ______ all times.
【小题4】Should we climb ______ anyone else?
【小题5】We shouldn't throw rubbish ______ the stream.
【小题6】There are some rules ______ visitors.