An ant was drinking by a small river when it fell in.It made ______ efforts to reach the side，but made no progress at all.

It is reported that Beijing and Zhangjiakou（张家口）will compete to host the 2022 Winter Olympics, which will _____ China’s social development.

依次填入下面横线处的语句，衔接最恰当的一组是(　　)近年来出现了所谓国学热。________重要的不是意见之争，而是学理或技术性争论。①就像自然生态需要多样性，不能随便说哪个物种是“坏的”，更不能随便认为哪种文化不应该存在。②关于国学到底“好不好”这样的问题几乎没有意义。③但居然演变成一种“轻浮”的文化争论，这就让人失望了。④何况国学存在数千年，自有其伟大力量和深刻道理。⑤过于随便地进行批判，没有任何建设性。⑥国人对国学有兴趣，本是理所当然的事。

Why does Sara know so much about Angkor Wat?—She ________have been there, or …[ ]

Please the paper， Jimmy!–But I haven’t checked it yet， Mr. Black..