【C2】A．lengthB．rangeC．extentD．limit

A． timeB． rangeC． distanceD． space

【C19】A．scopeB．rangeC．fieldD．district

【C20】A．lengthB．longevityC．durabilityD．endurance

A．amountB．quantityC．extentD．equivalent

【C9】A．riseB．rangeC．varyD．keep

【C4】A．lengthB．distanceC．degreeD．lengths