依次填入下面一段文字横线处的语句，衔接最恰当的一组是 （   ）
书法是易学难精的艺术。作为一门传统艺术，                                    。唯其如此，才能成为生活中真正的随心所欲不逾矩的书法大家。
①它要求笔墨有出处，结字有法度                  ②诚然，既定的法度有时会将书法限制死板
③传承是它显著的特征                                ④“穿着汉唐服装，舞出时代风采”
⑤但是一流的书法家都是从法度中走出来的      ⑥不像现代艺术那样可以“天马行空为所欲为”

如图，在网格中，小正方形的边长均为1，点A，B，C都在格点上，则∠ABC的正切值是（　　）

短文填空

    One ____(rain) night I was driving along a lonely highway ____I saw a man walking rapidly ahead of me along the side of the road.It was pouring rain and I slowed down to avoid splashing him as I went by.

    He misunderstood and thought I was offering a ride，and ran towards my car. He was very tall and had a full beard, ____ scared me. I stepped on the gas pedal  ____（leave）quickly and I saw the look of total despair in his eyes. Suddenly，all fear was  ____(go) and I backed up and unlocked my car door，praying this was not the ____(big) mistake in my life but somehow knowing it would be okay.

    The man's truck had got stuck ____the mud. He ____(walk) for miles.No one would pick  ____up and his wife was giving birth to their first child in the hospital. He had cried at the thought that he might not be there. ____ fortunate), we arrived in the hospital before his son was born.