填空题

S5. Geologists think that the rock deep in the earth is_______________________.

【参考答案】

plastic
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填空题
S2. At present, most scientists hold that much of the heat inside the earth comes from __________.
单项选择题
A．He likes to sleep.B．He has a lot of dreams.C．He does not have any good ideas.D．He does not put his ideas into practice.
A．He likes to sleep.
B．He has a lot of dreams.
C．He does not have any good ideas.
D．He does not put his ideas into practice.
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