【C4】A．distinguishB．acknowledgeC．identifyD．convey

A．relateB．realiseC．identifyD．connect

【C15】A．predictB．acknowledgeC．argueD．ignore

A．distinguishB．preventC．judgeD．differ

【C9】A．delayB．doC．deliverD．convey

【C9】A．distinguishB．recognizeC．protectD．print

【B8】A．incomingB．shippingC．movingD．conveying