Complete the sentences below.Write ONE WORD ONLY for each answer.The website will sort out 1items to help those who can't decide what to exchange.Do not bother because everyone's 2is different.Users will give 3on the completion of exchanges.Criteriathe quality of the itemthe ease of communicationthe 4of delivering
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【正确答案】 1、popular,    2、taste,    3、feedback,    4、speed    
【答案解析】解析：听完ease of communication后，接下来的“the speed at which the item was delivered…”为本题考点句，故答案为speed。