4)

1. I need to pluck up some courage to say hello to her.

2. It isn't always easy to strike up a conversation with a stranger.

3. He wasn't the person I wanted to befriend.

4. I had the time of my life when we were together.

5. I couldn't believe my ears.

6. It's part of nature to want to socialise.  

7. In the end, we found some common ground.

19)

1. What are your main interests and hobbies?

2. What do you love doing and what can’t you stand doing?

3. What were you into when you were a child?

4. Are you a fan of any particular sports team?

5. Are you keen on reality TV shows?

6. Is there anything that you’re really hopeless at?

17)

1. I was worn out after the marathon. Very tired

2. I was stunned by the beauty of the view. Very surprised

3. I was shattered after the four-hour exam. Very tired

4. I was delighted to hear that my English friend is coming to visit. Very pleased

5. I was petrified when I saw the huge spider on my bed. Very frightened