SAT语法题,谢谢!waterways close to land（ poses ）challenges to navi

懂英语的帮我精确翻译一下词 谢谢land on the water close to the german submar 求问几道SAT语法题!谢谢 SAT语法题,谢谢啦! 疑问是to improve和improving SAT语法题 SAT语法IE题 in order for the audience to 一道英语语法题Overpopulation poses a terrible threat to the human r close to close 几道sat语法题1、Many　jazz　enthusiasts　（would　have　to　admit）　that　（ SAT语法 due to的用法 close to Overpopulation poses a terrible threat to the human race.Yet close-to-close是什么意思（语境：on a close-to-close basis）?