G9-U2-L2

I wear a mask to protect myself from breathing in the ____________________ air in the city.

The ____________________ is an underground railway system in a city, often used for public transportation.

The city is often called a ____________________ because of all the tall buildings.

.. My dad is a construction worker, so he often visits the ____________________.

The ____________________ is a fun place to hang out with friends and family.

The ____________________ is an elevated train system that runs above the city streets.

Manh feels stressed when he has to drive on the ____________________.

My friends ride their bikes to ____________________ the city every weekend.

We turn off lights when we leave a room to ____________________ electricity.

Linda and Anna are ____________________ a project to plant trees in the park.