I’m planning to hold a party in the open air, but I can make no guarantees becauseit _ the weather.[ ]

aoYu Island have been part of China’s territorysince ancient times, __________as important fishing grounds of Taiwan

When did you learn the news that Obamamade a trip to Canada as President— _________ was on my return

依次填入下列各句横线处的成语，最恰当的一组是（ ）①他是一个心地善良的人，但性格懦弱、谨小慎微，做起事来总是 ，从来不敢越雷也一步。②当今世界科技突飞猛进，我们更要勇于开拓，不断进取，如果 ，就会落后甚至被时代潮流所淘汰。③想让中国传统戏曲焕发出新的生命力，决不能满足于现状， ，唯有创新才是弘扬戏曲文化的康庄大道。

The ticket ______ him ￥20.And flying to the USA ________him two days.