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单选题

A． It often interferes with construction.
B． It helps keep the soil in place.
C． It grows quickly after heavy rains.
D． It makes slopes unstable.

参考答案B

解析:What does the professor say about vegetation on a slope?
细节题。教授指出For example，natural vegetation，like grass，is needed to keep soil firmly in place．即“像草这样的天然植被能保持土壤的牢固”。因此,正确答案是B。

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单选题

A． Frequent landslides.
B． Too much vegetation.
C． Water draining from another slope.
D． A wall that stops water from draining.

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单选题Questions are based on the following passage.
A powerful earthquake struck an area near the northern coast of Chile on Wednesday. The earthquake came a day after an even stronger quake hit the area. The earlier quake was 26 at least six deaths. The United States Geological Survey says a 7.8 magnitude aftershock hit northern Chile late Wednesday night, local time. Magnitude is a 27 of the energy released at the centre, or source, of an earthquake. U.S. officials said the aftershock was centred about 23 28 south of the port of Iquique. They said it struck at a depth of 20 kilometres below sea level. The aftershock led Chilean officials to order thousands of people away from 29 . It also led to warnings of high 30 waves in parts of the Pacific Ocean. The orders and tsunami warnings were later 31 . The aftershock struck a day after an even more powerful earthquake hit northern Chile. That quake was centred in an area about 100 kilometres northwest of Iquique. The city is home to nearly 200,000 people. The quake was felt in Bolivia and Peru. It also 32 tsunami warnings as far as Japan. The warnings were cancelled hours later.
Chilean police and soldiers guarded coastal 33 to prevent attacks on homes and businesses. Television video showed damaged buildings in Iquique. But officials found surprisingly light damage from the quake. President Michelle Bachelet visited the affected area. She spoke to the nation about the disaster. She said 34 measures have been taken to protect lives and property. And she said the government will continue to work all the time that is necessary to 35 this emergency and protect our citizens.
A.cope with
B.promote
C.led to
D.kilometres
E.due to
F.measurement
G.tornado
H.kilogram
I.appropriate
J.communities
K.compensate
L.tsunami
M.blamed for
N.coastal areas
O.Cancelled
第（26）题选

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单选题第（27）题选

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