What is it about him lying on the ground with bare arms and cuts on his face?

A. naked  B. nude  C. bare  D. undressed

以上4个形容词区别解释如下

(1)naked： 指全身一丝不挂，暴露无遗。

Her naked body was found wrapped in a sheet in a field.

在田里发现了她的尸体，全身赤裸，裹在一条床单里。

The hot paving stones scorched my naked feet.

烫人的铺路石灼烤着我的一双赤脚。

They stripped me naked.

他们扒光了我的衣服。

He stood naked in front of me.

他赤身裸体地站在我面前。

(2)nude:指身没有穿任何衣服，处于全裸状态。

The occasional nude bather comes here.

偶尔会裸泳的那个人到这里来了。

She turned down £1.2 million to pose nude in Playboy.

她拒绝了为《花花公子》杂志拍摄裸照的120万英镑开价。

In the reproduced bronze she is completely nude.

她全身赤裸，皮肤是日晒后的古铜色。

(3)bare： 指缺少必要的遮盖物。用于人时，多指身体的部分裸露。

She was wearing only a thin robe over a flimsy nightdress, and her feet were bare.

她只在薄如蝉翼的睡衣外套了一件薄睡袍，而且光着脚。

She had bare arms and a bare neck.

她的胳臂和脖子都露在外面。

(4)undressed：指没有穿衣服，或者穿上少量睡衣。

Fifteen minutes later he was undressed and in bed.

15分钟后他便穿了睡衣躺在床上了。

He got undressed in the bathroom.

他在浴室里脱了衣服。