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At the beginning of this century, medical scientists made an interesting discovery; we are built not...
题目内容：
At the beginning of this century, medical scientists made an interesting discovery; we are built not just of flesh and blood but also of time. They were to show that we all have “a body clock” us, which controls the and fall of our body energies, us different from one day to the next.
The of “a body clock” should not be too since the lives of most living things are controlled the 24 hour night-and-day cycle. We feel and fall asleep at night and become and energetic during the day. If the 24 hour-cycle is , most people experience unpleasant . For example, people who are not to working at night can find that of sleep causes them to badly at work.
the daily cycle of sleeping and , we also have other cycles which longer than one day. Most of us would that we feel good on some days and not so good on ; sometimes our ideas seem to flow and at other times, they do not exist.
1.A．anxious B．able C．careful D．proud
2.A．inside B．around C．between D．on
3.A．movement B．supply C．use D．rise
4.A．showing B．treating C．making D．changing
5.A．invention B．opinion C．story D．idea
6.A．difficult B．exciting C．surprising D．interesting
7.A．from B．by C．over D．during
8.A．dull B．tired C．dreamy D．peaceful
9.A．regular B．excited C．lively D．clear
10.A．disturbed B．shortened C．reset D．troubled
11.A．moments B．feelings C．senses D．effects
12.A．prevented B．allowed C．expected D．used
13.A．miss B．none C．lack D．need
14.A．perform B．show C．manage D．control
15.A．With B．As well as C．Except D．Rather than
16.A．working B．moving C．living D．waking
17.A．repeat B．remain C．last D．happen
18.A．agree B．believe C．realize D．allow
19.A．other B．the other C．all other D．others
20.A．just B．only C．still D．yet
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