_ to New York,her father has not heard from her._ to New York,her father has not heard from her.A.Because she went B.after she went C.when she went D.Since she went问人问到答案是D,这个是过去完成时吧,但是为什么不能用B

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_ to New York,her father has not heard from her.
_ to New York,her father has not heard from her.A.Because she went   B.after she went  C.when she went   D.Since she went问人问到答案是D,这个是过去完成时吧,但是为什么不能用B或者C呢?

四个答案都不是过去完成时,都是一般过去时.因为主句动词是现在完成时,从句只能倒退一个时态必然是一般过去时,过去完成时要倒退两个.既然时态一样那么就要看前面那四个副词了.B也可以,但是有D就是最佳答案了.since可以突出他去了纽约那段时间,他爸爸一直没收到她的消息.而after只能表示某一个时间点.