Problems about arithmetic series often appear in math tests.

Understanding geometric series is important for understanding mathematics.

The harmonic series continues indefinitely, but its sum is not finite.

The police found a drowned corpse in the river.

He put a lot of effort into making the project successful.

The sewage treatment facility in this area is introducing the latest technology.

He was lapping at the ice cream.

He spent a decade at that company.

I manage the receipts and expenditures every month.

He is being tossed about by a misfortunate fate.