EF Oxford C1.3 : Extremes

Do we have the correct definition for 'nickname'? To call someone or something with a specific, informal name

As an experienced skydiver, you must take control of everything for your own mental and physical well-being.

A friend of my sister’s lost his eye in an accident on his last trip.

Could you check my sentence? I know you’re a bit scared of dogs, but I promise mine are really friendly.

You should always remind ... that you are able to give your best shot!

Do you know the meaning? You are skating on thin ice!

...sports, such as skiing and snowboarding, are the favourite hobbies of many people ...to extreme activities as diving.

The researchers hope to ... to develop new treatments for cardiovascular diseases.

Anna's favourite part of the trip was visiting … famous cherry blossom gardens.

Percy decided to explore through the swamp without a guide, fully aware he was ….

Hiking without useful equipment in extreme weather conditions is truly ….

Could you correct my sentence? Laurine managed to hike a mountain by himself.

The smartphone restarted itself after the update finished.

Do we have the correct definition of 'dice with death'? Not welcoming or generous to people who visit you

Do you know an idiom that has the opposite meaning of 'throw in the towel'?