【单选题】【消耗次数:1】
The monument(里程碑) was built in honor of the explorer who was believed________the river.
to have discovered
to have been discovered
to discover
having been discovered
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相关题目
【单选题】 13.The monument(里程碑) was built in honor of the explorer who was believed ____the river.
①  to have discovered
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随机题目
【单选题】 函数在点可微且在该点取极值,则在点处必有()
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【单选题】 ().
① 
② 
③ 
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