A. testing what influences the level of endocannabinoids released
B. identifying what the cause of the runner's high is
C. observing the specific symptoms of the runner's high
D. finding what reduces the runner's high symptoms
63. The underlined word ''notion" in Paragraph 7 has the closest meaning to .
A. effect
B. suggestion
C. question
D. belief
64. According to the UK's National Health Service, working out regularly .
A. can help ease depression symptoms
B. is the best way to treat depression
C. can help people recover from depression completely
D. can work for those with serious depression effectively
D
“Could you see the whites of their eyes?" said the man, who was seated on a soap box.
“Nothing of the kind,",replied old Henry warmly. "Just a lot of figures running towards us, and
I let go at where there appeared to be most. Bang!”
“Mr. Fleming,said the grocer —his respectful voice expressed somehow the old man's exact social weight —“Mr. Fleming, you never were frightened much in those battles, were you?”
The veteran （老兵）looked down and smiled. Observing his manner, the entire group laughed a little. "Well, I g uess I was,” he answered finally, “Pretty well scared, sometimes. Why, in my first battle, I thought the sky was falling down. I thought the world was coming to an end. You bet I was Everyone laughed. Perhaps it seemed strange and rather wonderful to them that a man should admit the thing, and in the tone of their laughter there was probably more admiration than if old Fleming had declared that he had always been a lion. Moreover, they knew that he had ranked as an orderly sergeant （中士），and so their opinion of heroism was fixed. None, to be sure, knew how an orderly sergeant ranked, but then it was understood to be somewhere just shy of a major-general's stars. So, when old Henry admitted that he had been frightened, there was a laugh.
"The trouble was,” sai d the old man, " I thought they were all shooting at me. Yes, sir, I thought every man in the other army was aiming at me in particular, and only me. And it seemed so unreasonable, you know. I wanted to explain to them what an almighty good fellow I was, because I thought then they might quit all trying to hit me. But I couldn't explain, and they kept on being unreasonable. Blim! Blam! Bang! So, I ran!"