21、根據(jù)下面內(nèi)容，回答21-35題：
Earth is the only 21 we know of in the universe that can support human life.22 human activities are making the planet less fit to live on. As the western world 23 on consuming two-thirds of the world's resources while half of the world's population do so 24 to stay alive. We are rapidly destroying the 25 resource we have by which all people can survive and prosper.
Everywhere fertile soil is 26 built on or washed 27 the sea. Non-renewable resources are exploited so much that they will never be able to recover 28. We discharge pollutants into the atmosphere without any thought of the consequences. As a 29 the planet's ability to support people is being 30 at the very time when rising human numbers and consumption are 31 increasingly heavy demands on it.
The Earth's 32 resources are there for us to use. We need food, water, air, energy, medicines, warmth, shelter and minerals to 33 us fed, comfortable, healthy and active. If we are sensible in how we use the resources they will 34 indefinitely. But 35 we use them wastefully and excessively they will soon run out and everyone will suffer.
A．situation
B．place
C．position
D．site
22、
A．Although
B．Still
C．Yet
D．Despite
23、
A．continues
B．repeats
C．carries
D．follows
24、
A．a(chǎn)lready
B．just
C．for
D．entirely
25、
A．a(chǎn)lone
B．individual
C．lone
D．only
26、
A．sooner
B．neither
C．either
D．rather
27、
A．a(chǎn)bout
B．into
C．over
D．a(chǎn)cross
28、
A．quite
B．greatly
C．utterly
D．completely
29、
A．development
B．result
C．reaction
D．product
30、
A．stopped
B．narrowed
C．reduced
D．cut
31、
A．doing
B．having
C．taking
D．making
32、
A．natural
B．real
C．living
D．genuine
33、
A．hold
B．maintain
C．stay
D．keep
34、
A．last
B．stand
C．go
D．remain
35、
A．if
B．whether
C．what
D．how
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