I think that the answer to the question is C
<span>To ease pain by sticking thin needles into patients' skin </span>
Answer:
The main difference between past simple and past continuous tense is that:
- we use<u> past simple tense</u> when something happened at some time in past. We also commonly use this tense with past time adverbs (yesterday, last night, two days ago, etc.)
For example: John called his friend yesterday.
- we use <u>past continuous tense</u> if an action occurred in the past and <u>lasted for a period of time.</u>
Example: I was reading a book all day yesterday.
We used past continuous tense because the action of reading lasted for some time (a whole day in this case).
Answer:
Explanation:
because it is a form of supportive evidence and proves the authors point.
