This fertilizer helps plant growth.

I opened the medicine packet and took the medicine inside.

I scooped and drank the soup with a spoon.

I scooped and drank the soup with a spoon.

In this experiment, we will use an indicator to observe the reaction between acids and bases.

I am planning to go to Inner Mongolia, an autonomous region of China, next week.

I have been to Outer Mongolia.

I have been to Chicago.

The Paleogene period was a very important time in the history of the Earth.

When my stomach hurts, I always take an antacid.