1 . Holmes had taken out his watch, and as minute followed minute without result, an expression of the utmost annoyance and disappointment appeared upon his features. He bit his lip, drummed his fingers upon the table, and showed every other symptom of acute intolerance.

So great was his emotion that I felt sincerely sorry for him, while the two detectives smiled derisively (嘲弄地), by no means displeased at this check which he had met.

“It can't be a coincidence,” he cried, at last springing from his chair and pacing wildly up and down the room. “It is impossible that it should be a mere coincidence. The very pills which I suspected in the case of Drebber are actually found after the death of Stangerson. And yet they are inert (惰性的). What can it mean? Surely my whole chain of reasoning cannot have been false. It is impossible! And yet this wretched dog is none the worse. Ah, I have it! I have it!” With a perfect shriek of delight he rushed to the box, cut the other pill in two, dissolved it, added milk, and presented it to the terrier (㹴犬). The unfortunate creature's tongue seemed hardly to have been moistened in it before it gave a convulsive shiver in every limb, and lay as rigid and lifeless as if it had been struck by lightning.

Sherlock Holmes drew a long breath, and wiped the sweat from his forehead.“I should have more faith,”he said,“I ought to know by this time that when a fact appears to be opposed to a long train of deductions, it uncertainly proves to be capable of bearing some other interpretation. Of the two pills in that box, one was of the most deadly poison, and the other was entirely harmless. I ought to have known that before ever I saw the box at all.”

This last statement appeared to me to be so startling that I could hardly believe that he was in his sober senses. There was the dead dog, however, to prove that his conjecture (推测) had been correct. It seemed to me that the mists in my own mind were gradually clearing away, and I began to have a dim, vague perception of the truth.

1. Judging by Holmes’ facial expressions from the first paragraph, he appeared to be _______.

A．impatient	B．worried
C．amazed	D．satisfied

2. When are the very pills actually found according to the third paragraph?

A．On arriving on the spot.	B．When testing the dog.
C．After the death of Stangerson.	D．After Holmes’ thinking for so long.

3. How did Holmes prove his own conjecture from the third and fourth paragraphs?

A．By taking the pills.	B．By sending for others to test the pills.
C．By testing himself.	D．By doing the experiment with the dog.