摘要： I really wonder he has posted me many parcels we worked together . A. how ; after B. why ; when C. when ; before D. why ; since 答案是D项.英语中的连词since有这样的特性:终止其后从句中的延续性的谓语动词的动作.第二个空白处填入since之后.这个从句的意思是:自从我们不在一起工作起.此外.since还可使其后从句里的非延续性的谓语动词延续.例如:It is 15 years since he joined the Army .
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