The child ____on the chair and eating a cake .A sitting B is sittingwhy?

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The child ____on the chair and eating a cake .A sitting B is sittingwhy?

The child ____on the chair and eating a cake .A sitting B is sittingwhy?
The child ____on the chair and eating a cake .A sitting B is sitting
why?

The child ____on the chair and eating a cake .A sitting B is sittingwhy?
B
句中缺少谓语,而sitting是现在分词或动名词,不能在句中独立作谓语.is sitting是现在进行时,在句中作谓语.
句意:那个小孩正坐在椅子上吃着一个蛋糕.

B is sitting
一句话中,必须要有系动词。

is sitting
A错了,因为表示一般现在进行时,动词除了后面加ing外,前面还有加be动词
这里child是单数,所以用is

选B

b
现在进行时 be +doing and后面有eating 所以判断前面是现在进行时