题目内容：

“The hound(猎犬)!” cries Holmes. “Come, Watson! Come.”

We run quickly over the moor(荒野). We hear one last cry. A man is lying on the ground. As we approach(靠近) we see the dead body of Sir Henry Baskerville. He is wearing his brown suit.

“Oh, no!” says Holmes, “This man has a beard!”

Indeed Selden is dead instead of Sir Henry.

“So it is all clear to me. I remember that Sir Henry gave his old suit to Barrymore, and Barrymore probably gave it to Selden—his wife's brother.”

“Then Selden is dead because of this suit,” says Holmes.

“Think, Watson! Someone gives the hound some of Sir Henry's clothes—probably the boot from the hotel in London. The hound picks up Sir Henry's scent and runs after this poor man.”

Suddenly we see Stapleton walking towards us. He says, “There was a strange noise. I was worried about Sir Henry. I wanted to check if he was all right.”

“Really?” asks Holmes.

Stapleton looks at Holmes. “Why, it is Mr Sherlock Holmes, the famous detective! Can you solve the mystery of the Hound of the Baskervilles?”

Holmes shrugs his shoulders,“We cannot solve every mystery. Anyway I will return to London tomorrow.”

“Oh, will you return to London tomorrow?”

“Yes.”

So Holmes and I walk off to Baskerville Hall and Stapleton walk to his home.

Holmes thinks Stapleton is dangerous. But we have no proof that Stapleton is the murderer.

“There are no marks on Sir Charles's body. We know that he died of fright, but we can't prove anything.”

“Things are becoming clear to me,” Holmes says to Sir Henry. “It's a very difficult case. And you must help me to catch this hound.”

We are surprised to see one portrait(画像) of a thin man is Sir Hugo, the first victim of the Hound of the Baskervilles. And he's like both Sir Henry and Stapleton. “Stapleton is a Baskerville,” replies Holmes. “So he wants to inherit(继承) the Baskerville fortune, and he…,” I say. It's an important clue.

1.The underlined word “scent” in Paragraph 7 probably means “____________”.

A. taste B. boot C. suit D. smell.

2.We can infer(推断) from the passage that____________.

A. Sir Henry tells Holmes that Stapleton is a Baskerville

B. Stapleton wants to murder Sir Henry indeed

C. Watson finds out that Selden is Mrs Stapleton's brother

D. Stapleton kills Selden by frightening him with the hound

3.Which of the following is TRUE according to the passage?

A. Holmes and Watson think Mr Barrymore murders Selden.

B. Holmes doesn't catch Stapleton because he has no proof.

C. Holmes and Watson find the dead body of Stapleton on the moor one night.

D. Holmes tells Stapleton that he and Watson are going back to London.

4.According to the last paragraph, what gives Sherlock Holmes an important clue?

A. One portrait of Sir Hugo.

B. The Hound of the Baskervilles.

C. The Hound of Sir Henry.

D. One portrait of Stapleton.