He played innocent by pretending he knew nothing.

We vowed to see this project through to the end.

The government decided to change the direction of its economic policy.

Before getting on the train, the station staff punched my ticket.

I worked all day and ended up being tired out.

He worked hard to overcome difficulties.

I decided to completely cut off my relationship with him.

He hung up the phone in anger.

Annam is the old name of Vietnam.

In this chemical experiment, we will observe the reaction using ammonium phosphate.