Exercise is as any other to lose unwanted weight.A. such useful a way B. so useful a wayC

问题补充：

Exercise is as any other to lose unwanted weight.

A. such useful a way

B. so useful a way

C. as a useful way

D. as useful a way

答案：

A. such useful a way

B. so useful a way

C. as a useful way

(答案→)D. as useful a way

解析：本题考查as…as的用法。在结构as…as中的两个as之间通常接形容词或副词的原级，但若涉及数量或程度，可用“as much+不可数名词+as”和“as many+可数名词复数+as”；如节可数名词单数要用“as+形容词+(a/an+)名词+as”结构。