Question 19: B. Studying

• Explanation: "Studying abroad is a big challenge for anyone to face" uses "studying" as a noun (gerund).

Question 20: D. something

• Explanation: "Learn something about the country" fits the sentence context, implying that the person should learn something about the country.

Question 21: D. manner

• Explanation: "The way people behave" is the most appropriate phrase here, indicating the behavior of the people.

Question 22: D. Whether

• Explanation: "Whether learning a new language" is used correctly here to show an option or alternative (learning a language or trying food).

Question 23: C. Besides

• Explanation: "Besides, it's advisable to keep a journal" means "in addition to the other advice."

Question 24: B. allows

• Explanation: "It allows you to reflect on what you've learned" fits well because "allow" means to give the opportunity or permission.

For the second part, choosing the sentence closest in meaning:

Question 25: A. Ella was too exhausted to finish her performance.

• Explanation: The original sentence indicates that Ella was too tired to finish, so the closest meaning is that she was too exhausted to continue.

Question 26: A. Avoid junk food to prevent weight gain.

• Explanation: The original sentence warns about eating junk food and gaining weight, and option A correctly suggests avoiding junk food to prevent weight gain.