Question

【题目】By the end of last week, they _____ more that 30,000 books of this kind.

A. sold B. had sold

C. were selling D. have sold

Answer 1

【答案】B

【解析】考查谓语动词的时态。句意：到上周末为止，他们已经卖出了这种书30000本。by+过去的时间，句子要用过去完成时，根据句中的“ by the end of last week”可知，本句用过去完成时，因此选B项。