Question

【题目】We have learned over 1500 words ____ this term.

A. at the end of B. at the end C. in the end D. by the end of

Answer 1

【答案】D

【解析】句意：到这个学期末我们已经学会了超过1500个单词了。at the end of在...的末尾；at the end在最后，介词短语，在句中做状语，后面不跟名词；in the end最后，后面不跟名词；by the end of到...的末尾，常和完成时态搭配使用。根据句中谓语动词的时态have learned...可知应选D。