单项选择题

Which of the following is NOT the mentioned minerals in the last paragraph（）

A．Coal.
B．Gas.
C．Limestone.
D．Sand and gravel.

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When do they arrive at the pond（）

A．A little before noon.
B．A little after noon.
C．In the late afternoon.
D．On the evening.
单项选择题
Phillip and Geoffrey's voices must be（）

A．sharp, nervous, tiresome
B．anxious, angry, inspiring
C．soft, sweet, pleasing
D．eager, excited, demanding
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