---they have a car?--Yes they .A. Do areB. Are doC. Do doD. Are are[来

问题补充：

---they have a car? ----Yes, they .

A. Do, are

B. Are, do

C. Do, do

D. Are, are[来

答案：

A. Do, are

B. Are, do

(答案→)C. Do, do

D. Are, are[来

解析：have 有，是行为动词，变成一般疑问句需要添加助动词do，回答也用do或don’t来回答。