Use quotation marks [ “ ” ] to set off material that represents quoted or spoken language. Quotation marks also set off the titles of things that do not normally stand by themselves: short stories, poems, and articles. Usually, a quotation is set off from the rest of the sentence by a comma; however, the typography of quoted material can become quite complicated. Hope that helped
What are the underlined words
Answer:
Since the middle of the 20th century, scientists <u>have found</u> cures for many diseases. However, so far no one <u>has discovered</u>
Explanation:
those are the perfect tenses for (find) and (discover)
