The question is missing the options to complete each sentence. Here are the options:
<em>The professor seemed very (selfassured, self assured, self-assured) , but the students were afraid he would (resign, re-sign, re sign) , which is why they (re signed, resigned, re-signed) the petition to investigate the false (allega-tions, allegations, alle-ga-tions) made against him.</em>
Answer:
The professor seemed very <u>self-assured</u>, but the students were afraid he would <u>resign</u>, which is why they <u>re-signed</u> the petition to investigate the false <u>allegations</u> made against him.
Explanation:
A hyphen is a punctuation mark used to join two words together in order to create a new meaning or a combined meaning, join a prefix to another word or show word breaks.
“Self-assured” is a compounded word joined by a hyphen. It is formed by a noun and an adjective. These words when put together mean to be sure of oneself.
“Resign” in this sense means to quit or give up one's job position.
“Re-sign” is a compound word joined by a hyphen. It is formed by the prefix “re” (which indicates repetition), and the verb “sign.” As a whole, this word means “to sign again.”
“Allegations” is a noun used to refer to an assertion especially of misconduct.