Before starting on a sea voyage, prudent navigators learn the sea charts, ______ and memorize lighthouse locations to prepare th

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问题 Before starting on a sea voyage, prudent navigators learn the sea charts, ______ and memorize lighthouse locations to prepare themselves for any conditions they might encounter.

选项 A、sailing directions are studied
B、study the sailing directions
C、to direct sailing studies
D、studies direct sailing

答案B

解析 本题考查平行并列结构。根据空格前的learn和空格后的and memorize可知,句子的谓语是and连接的三个并列动词,空格处所填应为动词或词组的原形,故答案为[B]项。
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