the risk of sleep deprivation.
our concern about good health.
one possible cause of early death.
our ignorance about the lack of sleep.
第1题：
What does the phrase “clam up” in Paragraph 2 probably mean?
A. become excited B. show respect
C. refuse to talkD. seek help
第2题：
Striking in the second paragraph is used to mean ______.
A. remarkable
B. terrifying
C. important
D. insignificant
从上下文来看，野狗在获取猎物后先喂饱小狗。作者认为此举是非凡的。
第3题：
The underlined word “ There” in the second paragraph refers to (指的是)____________.
第4题：
The phrase “hold water” in the last paragraph most probably means”_____”.
A. to be believable B. to be valuable C. to be admirable D. to be suitable
第5题：
What does the phrase “clam up” in Paragraph 2 probably mean?
A．become excited
B．show respect
C．refuse to talk
D．seek help
第6题：
The phrase “keep a lid on”(Line 6, Paragraph 3) most probably means_____.
［A］ put an end to
［B］ set a limit on
［C］ tighten the control over
［D］ reduce the speed of
本题考查词义理解。“keep a lid on”出现在最后一段倒数第二句，表示对“日元升值”做的动作。下文提到具体做法是：日本中央银行忙于购进美元并且把这些钱转为政府债务。四个选项都是同一方向的表达，根据经济常识，应选［B］，表示“限制日元的升值”。
第7题：
What does the phrase “the wake-up call”in Paragraph 3 most probably mean?
A．a new disease
B．a clear warning
C．a dangerous animal
D．a morning call
第8题：
Judging by the context, the phrase "in tandem" in the last paragraph probably means______.
A．in touch
B．altogether
C．in contrast
D．alongside
第9题：
The word "immersed" in the second paragraph means“______”.
A. lifted
B. raised
C. rose
D. under water
第10题：
下面的程序的运行结果是__________
func main() {strs := []string{"one", "two", "three"}for _, s := range strs { go func() { time.Sleep(1 * time.Second) fmt.Printf("%s ", s) }()}time.Sleep(3 * time.Second)}