1 . 听下面一段较长对话，回答以下小题。
1. By 2020, where should trash sorting happen?

A．In all major cities of China.

B．Only in Zhejiang province.

C．In Ms. Chu’s neighborhood.

2. What is Ms. Chu’s profession?

A．Trash collector.

B．Reporter.

C．Politician.

3. What is one of Mr. Tang’s solutions?

A．Door-to-door training.

B．Free trash cans.

C．Plastic trash bags.

4. How will a trash collector find a bag’s owner?

A．He will call a volunteer.

B．He will see a name on the bag.

C．He will scan the bag with a phone.