Coral reefs are very important for marine ecosystems.

Coral reefs are very important for marine ecosystems.

Postnatal care is very important.

Coral reefs play a very important role in the marine ecosystem.

We went to see a coral reef during summer vacation.

I went to the restaurant to eat lunch.

I have lunch every day at 12 o'clock.

I attended the meeting as his surrogate.

Where is Daito?

Tokyo is one of the metropolises in Japan.