I like finding fossils.

This hypothesis is based on scientific evidence.

This bridge is made of makeshift.

I will participate in the exhibition held in Tokyo next week.

We are planning to go to the science museum this weekend.

I plan to go to the national museum this weekend.

The use of fossil fuels is causing global warming.

He put a gag on her.

How does this machine work?

We will use caustic potash in this experiment.