任务二:根据短文内容填空。
1. Jack eats three meals on time .
2. Some of Jack's eating habits are , so he asks for advice online.
3. Mr Wang tells Jack some ways to his habits.
4. Mr Wang suggests that Jack should eat a small apple or a glass of warm milk before to bed.
5. Small changes will help Jack healthy.

1. every day 2. unhealthy 3. improve 4. going 5. keep

本题为根据短文内容完成填空的题型，结合对应原文内容和七年级所学语法规则解答：
1. 此处表达Jack每天按时吃三餐，填every day；
2. 后文提到他上网寻求建议，说明他的部分饮食习惯是不健康的，填unhealthy；
3. 此处表达王先生告诉Jack一些改善习惯的方法，to为不定式符号，后接动词原形，填improve；
4. 介词before后需要接动名词形式，go to bed是固定搭配，故填going；
5. 符合固定搭配help sb (to) do sth，此处表达保持健康，填keep。

任务三:根据短文内容,回答下列问题。
1. What does Jack eat before bed?

2. What does Mr Wang suggest Jack eat instead of cookies before bed?

3. According to Mr Wang, what will help Jack stay healthy?

4. If you were in Jack's shoes, what small change will you make first?

【解析】：本题为阅读问答题，需结合对应配套短文内容解答，第4小题为开放性题目，给出符合健康主题、逻辑通顺的合理回答即可。结合该题配套的原文内容可得出对应答案：1. Jack睡前吃大量巧克力曲奇；2. 王医生建议Jack睡前用少量水果，比如一根香蕉或者一个小苹果代替曲奇；3. 王医生认为健康的小改变，比如选择合适的食物、每天做20分钟运动，能帮助Jack保持健康。
【答案】：
1. He eats a lot of chocolate cookies before bed.
2. He suggests Jack eat a little fruit like a banana or a small apple instead of cookies before bed.
3. Small healthy changes, including eating the right food and doing 20 minutes of sports every day, will help Jack stay healthy.
4. I will give up eating sweet snacks before bed first, and I will drink a cup of warm milk instead to help me sleep well. (答案不唯一，合理即可)