No improvement to this sentence is necessary. It makes perfect sense on its own and sounds right. "Either" always takes an "or" else the word wouldn't make sense, as it's meant to contrast binary options.
eg.
I'm either going to eat food or drink water.
Answer:A last week he did 50 sit ups........
Explanation:
The poem “dover beach” by Matthew Arnold uses _____ as a symbol of continuity and change.
A. The Sea
Hope this answers your question!
<span>Parentheses enclose added material.
Parentheses enclose numerical figures that confirm written numbers.
Parentheses enclose explanatory material.
A parenthetic expression is a group of words, an idea, that is not closely related to the rest of the sentence.
It's important to note that parentheses are used for additional explanatory information, not for main ideas or important information.</span>