He speaks fast I can’t follow himA. so；thatB. such；thatC. so；as toD. enough；that

He speaks fast I can’t follow him．
A. so；that
B. such；that
C. so；as to
D. enough；that

(答案→)A. so；thatB. such；thatC. so；as toD. enough；that解析：so、such 区别So，如此，那么，用法是so+形容词，such,如此，那么。用法是：such+(a/an)+(形容词)+名词，但名词前有few,little,many,much修饰时只用so. so/such …that如此的……以至于……，fast副词，根据句意：他说的如此的快以至于我跟不上他。

感谢回答