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Thế Hiếu Nguyễn

HOW WELL DO YOU SLEEP?

Do you need complete silence to sleep well at night? While some people can sleep through a great deal of noise, others are woken up by the (9) …………… sound. It appears that as we sleep, our brains produce rapid pulses, or waves, called ‘sleep spindles’. Research has (10) …………… that our ability to sleep soundly may (11) …………… on the number of sleep spindles we produce.

Scientists conducted a three-day study on 12 volunteers, all of whom (12) …………… themselves as good sleepers. On the first night, the scientists (13) …………… the volunteers sleep in silence. On the following nights, however, they were subjected to various noises, ranging from the sound of a (14) …………… tap to jet engine roars.

Measurements of brain activity showed that the participants who reacted least to the noise were the ones who produced more sleep spindles, (15) …………… on the quiet night. It is hoped that this discovery will (16) …………… to new ways to help people who have difficulty sleeping.

 

9.

A. lightest

B. finest

C. slightest

D. weakest

10.

A. exposed

B. revealed

C. displayed

D. uncovered

11.

A. depend

B. involve

C. rest

D. base

12.

A. assured

B. declared

C. claimed

D. described

13.

A. permitted

B. agreed

C. let

D. allowed

14.

A. pouring

B. running

C. streaming

D. flowing

15.

A. even

B. precisely

C. still

D. exactly

16.

A. head

B. take

C. guide

D. lead

Phạm Vĩnh Linh
13 tháng 5 2022 lúc 16:29

9 C

10 B

11 A

12 B

13 C

14 B

15 A

16 D


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