[select readings_PreIn] Unit 1: Sleep

After 24 hours without sleep, Gardner started having trouble reading and watching television. The words and pictures were too ____.

• blery

• blury

• blurry

• bllury

"After a few weeks without sleep, the rats started losing fur. And even though the rats ate more food than usual, they lost weight. Eventually, the rats died."

Type one synonym of the word "eventually"

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Even though Gardner recovered quickly, scientists believe that going without sleep can be dangerous. They say that people should not repeat Randy's ______.

• experience

• experiences

• experiment

• expirement

"Heathcliff starts hallucinating Cathy's image everywhere." What does "hallucinating" mean?

• seeing things that aren't really there

• not looking clear

• after a long time

• test done to prove something

"Over the next few days, Gardner's speech became so __________that people couldn't understand him."

• recovered

• shocked

• relieved

• slurred

"Some scientists think we sleep in order to replenish brain cells."

What does "replenish" mean?

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Other scientists think we sleep helps tha body to grow and _____ stress.

• affect

• relieve

• return

• decrease

• How long can a human being _____ without sleep?

• take

• make

• do

• go

Which word cannot be used to fill in the gap: "Sleep _____"

• cycle

• timetable

• habits

• routine

• schedule

Pick the antonym(s) of the collocation "sleep soundly"

• sleep fitfully

• sleep quietly

• sleep badly

• sleep well