If you live in Shanghai，you might have taken a "lesson" in sorting（分类）garbage，as the city introduced new garbage-sorting regulations on July 1，2019．
    As China's first city to carry out strict regulations（规则） on garbage sorting and recycling，Shanghai requires its residents to sort garbage into four categories，namely recyclable，harmful，dry and wet waste．If people fail to sort their garbage properly，they can be fined up to 200 yuan．
    Since the regulation took effect，the amount of total daily waste in Shanghai has been reduced by an average of 15，500 tons，dropping 26 percent from the end of 2018，while the average daily weight of recyclables hits 4，500 tons，five times higher than the end of 2018，according to the Shanghai Landscaping and City Appearance Administrative Bureau．
    The city also rebuilt 21，000 waste-sorting stations and more than 40，000 waste bins have been updated．The city's waste collection and transportation system is complete，according to the bureau．
    "Proper waste sorting is to protect the environment and save natural resources，" said Deng Jianping，director of the bureau． "Led by the central government，Shanghai is making efforts to develop long-term solutions to garbage management．"
    However，there have also been some problems．Some people complained that it is difficult to deal with wet garbage，as they are asked to remove wet garbage from its bag when dumping（倾倒）．According to the sorting rules，the wet garbage must go in the wet waste bin and the bag must go in the dry waste bin．
    This separation is necessary，as it ensures that the wet garbage will decompose（分解） properly and become useful organic（有机的） waste，the bureau said．
    Plastic bags can affect this process．Some people in Shanghai are instead using paper bags that can biodegrade（生物降解）or plastic containers that can be washed and reused，according to Xinhua．

（1）When did the new garbage-sorting regulations come into effect in Shanghai？（不多于4个单词）

On July 1，2019.

On July 1，2019.

（2）According to the passage，people in Shanghai are asked to sort their garbage into four categories，and what are they？（不多于 8 个单词）

They are harmful，recyclable，dry and wet waste./Harmful，recyclable，dry and wet waste.

They are harmful，recyclable，dry and wet waste./Harmful，recyclable，dry and wet waste.

（3）Why should we sort garbage？ （不多于 11 个单词）

To protect the environment and save natural resources./
Because we/ sorting garbage can protect the environment and save natural resources.

To protect the environment and save natural resources./
Because we/ sorting garbage can protect the environment and save natural resources.

（4）How do people deal with wet garbage when dumping？ （不多于 7 个单词）

Remove wet garbage from its bag./People remove wet garbage from its bag.

Remove wet garbage from its bag./People remove wet garbage from its bag.