Question

______ interesting it is to go sailing in Qingdao in summer!

Answer 1

C

考查感叹句。修饰名词用what引导；修饰形容词或副词用how引导。句意“夏天去青岛玩帆船真有趣！”interesting是形容词，应该用how来引导感叹句。故选C。