![](https://cos-cdn.shuashuati.com/pipixue-web/2020-1231-2005-12/ti_inject-812ce.png)
In the following sentences, which one contains an unacceptable “v+ing”?
A.
Frankly speaking, the novel is terrible.
B.
Judging from its appearance, the box must have been there for hundreds of years.
C.
Allowing for his young age, the boy is very courageous.
D.
Standing on the mountain-top, the whole village could be seen clearly.