【推荐1】There is growing concern about various types of environmental problems, such as __________(海洋) pollution, __________ (雾霾), sandstorm, deforestation and so on. (根据汉语提示单词拼写)

【推荐2】A thousand tons of crude oil has spilled into the ________ (海洋). （根据汉语提示单词拼写）

【推荐3】There are few sights as beautiful as the calm ________ (大海) on a warm night. (根据汉语提示单词拼写)

【推荐1】Poor ___________(营养) can cause heart disease in later life （根据汉语提示单词拼写）

【推荐2】There is no formal ________ (确认) so far that he is at liberty. (根据汉语提示单词拼写)

【推荐3】Two ____(平台) on the stairs move horizontally, meeting at the center. (根据汉语提示单词拼写)

【推荐1】The scientist has made great __________ (贡献) to the space project. (根据汉语提示单词拼写)

【推荐2】Can I help you? We have many ______________ (品牌) and styles here. (根据汉语提示单词拼写)

【推荐3】Guests are welcome to use all the hotel’s ________(设施). (根据汉语提示单词拼写)