Question 37:
Work hard or your parents will be unhappy.
=> If you don’t work hard, your parents will be unhappy.

Question 38:
The last exhibition was more interesting than this one.
=> This exhibition is less interesting than the last one.

Question 39:
“How can I tell this news to my parents?” She wondered.
=> She wondered how she could tell that news to her parents.

Question 40:
In their community, the eldest child is usually responsible for his or her parents.
=> In their community, the eldest child is usually the one responsible for his or her parents.