11. 1. have you a go at that
2. will you set up one topic
3. do you have any question
4. can you give one more meaning
12. 1. they want to leave many things
2. they seem to have more thoughtful ideas
3. they may take actions on further studying
4. they’ve got to think about their businesses
13. 1. It’s all small stuff
2. It’s so important
3. It’s quite annoying
4. It’s questionable
14. 1. I can think of lots
2. You can take time
3. Anyone can solve the problem
4. It can have a superficial way
15. 1. many people should be more obligatory
2. you students must consider why it works
3. this question here needs to be carefully answered
4. I should say how people decentralize from the capital city