His irresponsible behavior has __________ (cause) a great deal of trouble to his sales team.
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This arrangement is a more ______ (economy) use of space.
我们提供各种服务，其中运输是主要的一项。We offer various services,________transportation is a major one.
我的一个梦想是环游世界。______ is to travel aroundtheworld
大屏幕看起来像一面玻璃墙。The ______ lookslike a glass wall.
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