My bicycle is broken, so I need to mend it.

He is working on the revision of the thesis.

He stayed up all night to revise his thesis.

This dress needs alteration.

He is good at retouching photos.

We are tallying up the monthly sales.

He is the leader of that group.

They were prepared for the enemy's counterattack.

They launched a counterattack against the enemy.

Our village was suddenly raided last night.