2 . 听下面一段独白，回答以下小题。
1. What issue are the scientists working on?

A．Climate change.

B．Electric vehicles.

C．Public transport.

2. Which country is the first one to provide free public transport service?

A．Luxembourg.

B．Germany.

C．The United States.

3. When did electric buses start running in Glasgow?

A．In July 2019.

B．In January 2020.

C．In March 2020.