The explorers say that these valleys are sure to gold mines, not having been fou
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The explorers say that these valleys are sure to ________ gold mines, not having been found, though．
A.contain
B.hold
C.include
D.hide
试题答案
A
句意：探险家们说，这个山谷肯定有金矿，虽然现在还没有找到。此句要用contain表示“含有”。