高等教育 / 新发展英语综合教程(二)
Diver try to bring up metals because _ _ _ _ _ _ _ _ .
A.they have been in the sea for a long time
B.gold and jewels are not valuable things
C.some kinds of metals are worth a lot of money
D.it is easy to bring up metals
A.they have been in the sea for a long time
B.gold and jewels are not valuable things
C.some kinds of metals are worth a lot of money
D.it is easy to bring up metals
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