He is struggling every day for his life.

He undergoes dialysis every week.

The authorities are investigating the incident.

I am waiting for his arrival.

We threw a party with the whole family to celebrate the arrival of the new year.

With the arrival of spring, the cherry blossoms began to bloom.

A new era has arrived.

Bacillus subtilis subsp. natto plays an important role in the fermentation of natto.

The technology of the present age is advancing remarkably.

The teacher collected the answer sheets from the students.