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Ⅰ. 完形填空(10 分)
Only humans speak using words. But all animals can 1 in one way or another. Did you know about infrasonic(次声的) communication used by elephants? This is 2 it works.
Humans hear low sounds in music. But we don't hear sounds lower than these. 3 , animals such as elephants can hear much lower sounds than humans can. And what's more, they can make 4 in that range(范围) as well, and they 5 them to communicate with each other. This is known as infrasound (次声).
Another 6 thing about infrasound is that it travels over several kilometres. Sounds, like the ones people can hear, don't 7 well through wall, leaves, trees, and so on, which is why we 8 not hear sounds from more than 100 metres away. But infrasound is much "stronger", and things like grass and trees make no 9 to it. Therefore, it can travel much further.
There have been reports of people watching groups of elephants feeding or resting and then the elephants 10 all ran away for no reason at all. They certainly heard a warning call from a long way away.
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Only humans speak using words. But all animals can 1 in one way or another. Did you know about infrasonic(次声的) communication used by elephants? This is 2 it works.
Humans hear low sounds in music. But we don't hear sounds lower than these. 3 , animals such as elephants can hear much lower sounds than humans can. And what's more, they can make 4 in that range(范围) as well, and they 5 them to communicate with each other. This is known as infrasound (次声).
Another 6 thing about infrasound is that it travels over several kilometres. Sounds, like the ones people can hear, don't 7 well through wall, leaves, trees, and so on, which is why we 8 not hear sounds from more than 100 metres away. But infrasound is much "stronger", and things like grass and trees make no 9 to it. Therefore, it can travel much further.
There have been reports of people watching groups of elephants feeding or resting and then the elephants 10 all ran away for no reason at all. They certainly heard a warning call from a long way away.
(
B
)1. [A] plan [B] communicate [C] change [D] treat(
C
)2. [A] why [B] where [C] how [D] when(
A
)3. [A] However [B] Therefore [C] Also [D] Later(
D
)4. [A] plans [B] faces [C] mistakes [D] sounds(
A
)5. [A] use [B] meet [C] mind [D] produce(
A
)6. [A] amazing [B] social [C] spare [D] direct(
C
)7. [A] live [B] deal [C] travel [D] post(
B
)8. [A] must [B] can [C] should [D] need(
C
)9. [A] progress [B] secret [C] difference [D] thought(
D
)10. [A] really [B] perfectly [C] happily [D] suddenly
答案：
1.B 2.C 3.A 4.D 5.A 6.A 7.C 8.B 9.C 10.D
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