问题
选择题
There are a great number of natural resources in the desert，which remain to be ________.[ ]
A．explored
B．exploited
C．exploded
D．exposed
答案
答案：B
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There are a great number of natural resources in the desert，which remain to be ________.[ ]
A．explored
B．exploited
C．exploded
D．exposed
答案：B