[求助]大全748

748.      The fear of rabies is well founded; few people are known to recover from the disease after the appearance of the clinical symptoms.

(A) few people are known to recover from the disease after the appearance of the clinical symptoms

(B) few people are known to have recovered from the disease once the clinical symptoms have appeared

(C) there are few known people who have recovered from the disease once the clinical symptoms have appeared

(D) after the clinical symptoms appear, there are few known people who have recovered from the disease（B）

(E) recovery from the disease is known for only a few people after the clinical symptoms appear

选b, 能解释一下吗？谢

这题

be known to do剩下AB

A中的appearance用的不好.有歧义。

appearance of
        

They've changed the appearance of the whole building.

We are often attracted to somebody first by their
                physical appearance.

Women, in general, tend to be more concerned than men about their personal appearance.

She had an outward appearance of calm, but deep down she was really worried.

The metal posts spoiled the appearance of the garden.

A garnish helps to enhance the appearance of any dish.

She's the kind of woman who takes pride in her appearance .

You shouldn't judge by appearances.

They work hard at school without giving the appearance of being particularly hard-working.

The case had all the appearances of a straightforward murder.

The pupils looked angelic - but appearances can be deceptive.

He was, to all appearances, a respectable, successful businessman.

2somebody takes part in a public event [countable]
            when a famous person takes part in a film, concert or other public event:

It was his first
                    public appearance
                since the election.

He
                    made
                his last
                appearance
                for the club in the Cup Final.

appearance money/fee (=money paid to a famous person to attend an event)

3something new starts to exist [singular]
            when something new begins to exist or starts being used
        

appearance of
            

The industry has changed greatly with the appearance of new technologies.

the appearance of buds on the trees

4arrival [countable usually singular]
            the unexpected or sudden arrival of someone or something
        

appearance of
            

Eileen was deep in concentration, and the sudden appearance of her daughter startled her.