【正确答案】 A

【答案解析】teacher：Hi. John. It's said that your group is going to do a questionnaire survey among children under the age of 10. Do you have any plans? boy：Yes, sir. We intend to go about this task by asking about 20 kids between the ages of 8 and 10. We will divide them into 4 groups based on their ages. We’d like to find out which kind of cartoons the children like. teacher：Well. The topic is novel and education. I think it will attract the public's attention.But if there are 4 groups, then in each group there will be 5 kids. I think the results may not be typical. Maybe it's better to sort them into 2 groups according to their age. boy：Wow. Thank you, madam. That sounds more reasonable. teacher：Besides, you also need to pay attention to the questions that are asked. They should be brief but typical. boy：Thank you for your advice, madam. I will bear them in mind.

【正确答案】 B