With cd it collins

a People say the two countries’ trade dispute has been resolved,
b We can be sure the two countries’ trade dispute has been resolved.

5. 
   The bicycle tyres were recalled by the manufacturer because they were liable to burst in certain circumstances.
   

a The manufacturer recalled the bicycle tyres because they had burst in certain circumstances.
b The manufacturer recalled the bicycle tyres because they could burst in certain circumstances.

5. 
   Grandfather’s wish to live in his own home is undisputed; we’re just not sure whether he can actually manage it.
   

a We doubt whether grandfather really can or wants to live at home,
b We know grandfather wants to live at home but we doubt whether he can.
Audio script
Unit 1 People and relationships
Track 01

1. 
   I've learned a lot from so many people, but I suppose the person that stands out is my colleague Lin. When I started working at the firm, my employer didn't give me a lot of formal training so I had to learn on the job. I was given the desk next to Lin and she explained everything to me. She was incredibly efficient. She knew the job so well, and she made it look so easy.
   
2. 
   The person I admire the most is probably my boss. She really knows what she wants to achieve with the organization, but at the same time she is so flexible and open to new ideas. She really takes an interest not only in her clients but also in her employees. She really listens to what they have to say.
   
3. 
   I suppose the relationship I've found most difficult - but ultimately most rewarding - has been my relationship with my younger brother. He's different from me in almost every way you can imagine. I'm the kind of person who likes to get things done, but he is a real dreamer - so idealistic. It used to drive me crazy, but over the years, I've come to really admire him for following his dreams.