When spring comes, the trees in the forest come into leaf.

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.

There was a spot on his shirt.

I have been to Ahmedabad.

We are developing new technologies to mine bauxite.

The blastoderm is formed in the early stages of embryonic development.

Chloroplasts are the locations where photosynthesis occurs in plant cells.