Ex. 2: Circle the correct answer: 1. I passed all my exams, made my parents very happy.
a. That b. What c. Which
2. London is the city the Olympic Games was held in 2012.

a. That b. where c. which
3. My sister Kate, studies English, has an Irish boyfriend.
a. That b. whose c. who
4. The play we missed turned out to be very successful.
a. Which b. who c. what
5. I’ve lost my car keys, is a real nuisance.
a. Which b. what c. that
6. Sibling is a person with you share a parent.
a. That b. who c.whom
7. Do you remember the times we built snowmen on cold winter days?
a. Where b. when c. that
8. Yesterday I bumped into Joe, sister used to be my girlfriend.
a. Who b. which c. whose
9. Everybody hasn’t done their oral exam yet needs to do it tomorrow.
a. Which b. who c. whose
10. The book you have lost doesn’t belong to me.
a. Which b. what c. whose

1. I passed all my exams, which made my parents very happy.
In this sentence, the word "which" is the correct answer. "Which" is used to introduce additional information or a nonessential clause. In this case, passing all the exams is the additional information that made the parents happy.

2. London is the city where the Olympic Games were held in 2012.
The correct answer is "where" because it is used to indicate a specific place or location. In this case, "where" is used to specify the city where the Olympic Games took place in 2012.

3. My sister Kate, who studies English, has an Irish boyfriend.
The correct answer is "who" because it is used to refer to a person. In this case, "who" is used to specify that the sister Kate is the one who studies English and has an Irish boyfriend.

4. The play which we missed turned out to be very successful.
The correct answer is "which" because it is used to indicate a specific thing or idea. In this case, "which" refers to the play that was missed.

5. I’ve lost my car keys, which is a real nuisance.
The correct answer is "which" because it is used to introduce a relative clause that adds extra information about the car keys being lost.

6. Sibling is a person with whom you share a parent.
The correct answer is "whom" because it is used as the object of the sentence. "Whom" is used to refer to a person when it is the object of a verb or preposition.

7. Do you remember the times when we built snowmen on cold winter days?
The correct answer is "when" because it is used to refer to a specific time. In this case, "when" is used to ask if the person remembers the times when they built snowmen.

8. Yesterday I bumped into Joe, whose sister used to be my girlfriend.
The correct answer is "whose" because it is used to indicate possession. In this case, "whose" is used to show that the sister belongs to Joe.

9. Everybody who hasn’t done their oral exam yet needs to do it tomorrow.
The correct answer is "who" because it is used to refer to a person. In this case, "who" is used to specify that everybody who has not done their oral exam yet needs to do it tomorrow.

10. The book that you have lost doesn’t belong to me.
The correct answer is "that" because it is used to introduce essential information or restrict the meaning of a sentence. In this case, "that" is used to specify the book that was lost.