under the tree?- No they aren’t.　　A. Where areB. What isC. Are theyD. Is it

问题补充：

--- under the tree? --- No，they aren’t.

A. Where are

B. What is

C. Are they

D. Is it

答案：

A. Where are

B. What is

(答案→)C. Are they

D. Is it

解析：根据答语可知问句为一般疑问句，复数形式，故选C。