Question 13: The correct answer is C. the.
We use "the" before a specific noun or when the noun is understood from the context. In this case, "the lesson" refers to the specific lesson being discussed.
Question 14: The correct answer is B. in.
We use "in" to indicate a location or place. Studying "in a quiet place" means studying within a quiet environment.
Question 15: The correct answer is B. Listen.
The advice is to pay attention to and follow the guidance of your teachers.
Question 16: The correct answer is A. ready.
"Ready" is an adjective describing the state of being prepared for something.
Question 17: The correct answer is D. travelled.
The underlined part in "travelled" is pronounced /əʊ/, while the other words have the /eɪ/ sound.
Question 18: The correct answer is D. dessert.
The underlined part in "dessert" is pronounced /ɛ/, while the other words have the /ɪ/ sound.

Question 19: The correct answer is D. Starting.
"Starting the day" is a gerund phrase acting as the subject of the sentence.
Question 20: The correct answer is A. fond of eating.
"Fond of" is a set phrase meaning to like something.
Question 21: The correct answer is B. Many people.
"Many people" is the correct quantifier to use in this context.
Question 22: The correct answer is A. to prepare.
"Spend time to prepare" is the correct phrase.
Question 23: The correct answer is D. Moreover.
"Moreover" is used to add further information or emphasize a point.
Question 24: The correct answer is A. should.
"Should" is used to give advice or recommendations.
Question 25: The correct answer is C. Starts.
"Everyone starts" is the correct grammatical structure.