Answer:
The present perfect tense is used when talking about experiences from the past, a change or a situation that has happened in the past but is still continuing today.
Explanation:
The first step in preparing your speech is to take a step back and try to look at it from the perspective of an audience member. See how they would perceive your speech - make sure it's understandable from their point of view and go from there.
Languages change to accommodate cultural changes. they adapt to new technology. old words have new meanings.
Answer:
A grammar term that refers to a material or substance from which things are made such as silver, gold, iron, cotton, diamond and plastic.
Explanation:
The subject here is simple" it's just "Antarctica" .
The verb is also not compound, it's a simple verb: "has".
The compound part of the sentence is the object: it is: "a thick ice cover and the highest average elevation of all the continents"
so the correct answer is "compound subject"
