---What are you going to do this afternoon?---My hair is too long. I want to get my hairA.

问题补充：

---What are you going to do this afternoon?

---My hair is too long. I want to get my hair

A. cut

B. to cut

C. cuts

D. cutting

答案：

(答案→)A. cut

B. to cut

C. cuts

D. cutting

解析：句意：今天下午你打算做什么？——我的头发太长了。我想把我的头发剪了。Have sth done把某事做了。Cut的过去分词和原形一致，故选A。