[考题] build up or build on

楼主: ambrosio (...)   2014-06-03 01:32:54
Some of the world's most luxurious resorts are on islands. Tropical
beaches and sparkling waters make up a popular getaway for so many
people around the world that construction companies are running
out of islands to ___.
(A) build up (B) build on
答案是A,请问选A要表达的语意是什么,
我是选B,因为我认为running out of islands to build (sth) on (them)
这样想对吗?谢谢
作者: tom91002 (皮皮)   2014-06-03 11:39:00
build up: Establish and develop (a business oror situation) over a period of time

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