“遇到路人要求扫二维码，并谎称自己是创业者，我出于好心帮其扫码，却在不知不觉中泄露了自己的个人信息。”南昌市民赵女士在街头为陌生人扫描二维码后，便一直收到骚扰电话和营销广告，对日常生活造成影响。赵女士的经历提醒我们要（    ）

①提高警惕，拒绝帮助别人           ②保护隐私，给隐私上把锁

③明辨是非，学会自我保护           ④封闭自己，减少与人交往

— _______ are you going to the School Uniform Exhibition, Amy?
— To learn about different styles of school uniforms.

昼夜现象是由于地球自转所形成的（    ）．（判断对错）

In order to safeguard（保证）the education of all Hope Chinese Scholl（HCS）students and the normal running of the school, the following rules should be followed:
★ Be quiet in classroom and hallways. Do not run or shout in classrooms or hallways.
★ Do not drink or eat in classrooms or hallways.
★ Stay in the school during school time as well as rest time. Do not leave the school or play out of the school area during school time. This includes rest time.
★ Do not scribble on any desks or walls.
★ Be respectful（尊敬）to teachers and parents.
★ Help teachers and other students to keep the classroom clean. Do not move desks, chairs, and other furniture in the classroom without the teacher's instructions.