依次填入下面横线处的句子，使前后句子衔接自然的一项是( )余光中的散文世界里，____①____，徐疾多致的节奏代替了平铺直叙的语序，____②____，幽默风趣的妙语代替了装腔作势的教训。

Fifty-six ______ twenty-seven makeseighty-three

I am in ________ charge of the class which was in ________charge of my wife.

The ____ is just around the corner and you won’t missit.

Mum, why have us eat much vegetable? —Because it is _____ to our health.