单选题 He said, "I ______ a lot of new words by the end of last year."
A. had already learnt B. would have already learnt
C. have already learnt D. already learnt

【正确答案】 A

【答案解析】[解析] 由介词by引导的时间状语，同时又有明确地表示过去的时间“last year”，谓语动词需用过去完成时。例如：By the time we got there, the bus had already gone. 当我们到达那儿的时候，公交汽车已经开走了。因此，答案A正确。