There are rich natural resources in the Hawar Islands EXCEPT
A. oil.
B. pearls-bearing oysters.
C. a rich diversity of birds, animals and sea-creatures.
D. cultured pearls.
正确答案是（）
A. finances
B. schedules
C. conventions
D. rituals
We feel an object is heavy
A. because weight is a fixed quality in an object.
B. because they are far away from the centre of the earth.
C. because of the earth's strong attraction for them.
D. because they are not taken away from the surface of the earth.
According to the passage, how many miles is the earth's diameter？
A. 2,000.
B. 4,000.
C. 8,000.
D. 16,000.
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