Ken is my best friend.

I am planning to go to Cologne next week.

He used a cairn to indicate the mountain path.

We threw a party to honor his good fight.

He fought bravely in the match.

The disadvantage of his plan is that it takes too much time.

We need to deeply research this issue.

We need to examine this issue.

In this noisy environment, it's hard for me to concentrate.

He swung the sharp sword.