包月的来电提醒，现在更改为按次的来电提醒什么时候开始执行？
参考答案：
取消后立即执行。
将下列句子括号内的中文写出英语的正确形式。
1. There are at least two (千) people in the hall.
2. Gymnastics is more （难）than running.
3. To do the job (好) is not easy.
4. My (最喜爱的) season is autumn.
5. Zhongshan Road is (繁忙)than Beijing Road.
艾滋病是由细菌感染引起的．______．
