–Where are your parents?–They on the ground.A. are lieingB. lieC. are lying D. are liing

问题补充：

–Where are your parents?

–They on the ground.

A. are lieing

B. lie

C. are lying

D. are liing

答案：

A. are lieing

B. lie

(答案→)C. are lying

D. are liing

解析：由语境可知时态为选择进行时

而 lie的现在分词为lying

故选C