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Although the internet company added many new products in online payments services last year, the total number of its products developed last year was declined.
d. last year, many new products in online payment services were added, the total number of the internet company's
e. in last year, many new products in online payment services had been added, the total number of the internet company's
正确答案是d。
疑惑的地方是,“many new products in online payment services were added"这件事,应该发生在“ the total number of the internet company's products developed last year was declined”之前,所以为什么e选项的过去完成时会是错误的呢?
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