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One of the main __________ of the summit was “sustainable development”,or the ?question? how we can continue developing the world without damaging the environment.
A．headlinesB．themesC．topicsD．deadlines
B
headline大字標(biāo)題；theme主題,主旋律；topic話題,主題；deadline期限。這里指的是大會(huì)的主題,應(yīng)用theme。
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