Answer:
1. Study your lessons well <u><em>and</em></u> you will get high grades.
2. Traveling is expensive <u><em>but</em></u> it can help you learn more about people's culture.
3. Life is difficult <u><em>but</em></u> it will teach you many lessons.
4. CO VID-19 took the lives of many people <u><em>yet</em></u> it has also brought us closer to God.
5. Children are not allowed to go out during this pan demic <em><u>or</u></em> they will be punished.
Explanation:
Con junctions or transition signals are those words that are used as linking words to join two or more sentences related to each other. They help shape the sentence and also provides a connection for the ideas between sentences or paragraphs.
In the given sentences, the respective con junctions or transition words to be used are as follows-
1. Study your lessons well <em><u>and</u></em> you will get high grades.
Here, the use of "and" presents a possible consequence of the action.
2. Traveling is expensive <u><em>but</em></u> it can help you learn more about people's culture.
"But" presents a contradictory argument for the statement "traveling is expensive".
3. Life is difficult <u><em>but</em></u> it will teach you many lessons.
Here, "but" connects the idea of the statement "life is difficult" and also presents a contrasting idea.
4. CO VID-19 took the lives of many people <u><em>yet</em></u> it has also brought us closer to God.
"Yet" presents a contradictory aspect of the given statement but also connects the two sides of the argument.
5. Children are not allowed to go out during this pan demic <em><u>or</u></em> they will be punished.
"Or" presents an alternative or 'other possibility' of the given statement.