I think that teenagers shouldn’t be allowed to get their .A. piercesB. to pierceC. piercin

问题补充：

I think that teenagers shouldn’t be allowed to get their .

A. pierces

B. to pierce

C. piercing

D. pierced

答案：

A. pierces

B. to pierce

C. piercing

(答案→)D. pierced

解析：考察使役动词用法,使役动词have get等加动词的过去 分词,表示把某事做了,故选D.我认为不应该允许年轻人耳朵穿孔.选D.