I think the correct answer is
D. <span>are; seem</span>
Answer:
You failed to provide any bold-faced words, so all I can do is correct the sentence as it should be written.
His first major find was<em><u> the</u></em> discovery of the planet Uranus in 1781 <em><u>.</u></em>
Add the word 'the' and a period as shown. And, technically, if Uranus is already understood to the listener/reader, then the word 'planet' is redundant.
Explanation:
She wasn't doing very well in her studies, so she tried to collaborate different studying techniques.
Singular noun is a noun that assigns to one thing, one person and one idea. Example: Boy, Girl, Father, Mother, Man, Doctor and so on.
