exhausting (adj) 令人精疲力竭的
That is a exhausting trip.
The first letter of {Exhausting} is a vowel so we use {an} instead of {a}.
That is an exhausting trip.

That is a exhausting sport.
The same problem mentioned above.
That is an exhausting sport.

That is a exhausting pet.
The same problem mentioned above.
That is an exhausting pet.

metres (n) 米
That thing is 10 metres.
The snack is 8 metres long.
The tower is 20 metres high.
Good!

destination (n) 目的地
The hotel is our destination.
The destination is fair.
We have no destination.
Use plural form here.
We have no destinations.