单项选择题

Questions 23-26

A．The walls of a shower room can be made of straw.
B．Extractor fans can be fitted on a straw wall.
C．Straw can "breathe" naturally by itself.
D．The straw wall looks exactly like a normal wall, with no straw showing anywhere.
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单项选择题
The reason some children are backward in speaking is most probably that ______.
A．they are incapable of learning language rapidly
B．they are exposed to too much language at once
C．their mothers respond inadequately to their attempts to speak
D．their mothers are not intelligent enough to help them
单项选择题
Although the fuel consumption is greater in the northern hemisphere, temperatures there seem to be failing. This is ______.
A．mainly because the levels of carbon dioxide are rising
B．possibly because the ice caps in the poles are melting
C．exclusively due to the effect of the inertia of the earth’s climate
D．partly due to variations in the output of solar energy
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