11/

1. This computer is old, but it's very good

2. My laptop is big, but it's easy to use

3. The cameras are light, but they're good quality

4. I have a new mobile phone, but it isn't expensive

5. This tablet is old, but it's fast

12/

1. This mobile phone is small but it's easy to use

2. It's new but it isn't expensive

3. It can take photos but it can't make % 1ms

4. It has a good memory but it's light

5. It's cheap but it's fantastic.

11/

1. This computer is old, but it's very good

2. My laptop is big, but it's easy to use

3. The cameras are light, but they're good quality

4. I have a new mobile phone, but it isn't expensive

5. This tablet is old, but it's fast

12/

1. This mobile phone is small but it's easy to use

2. It's new but it isn't expensive

3. It can take photos but it can't make % 1ms

4. It has a good memory but it's light

5. It's cheap but it's fantastic./