of this term we will have learnt 4 books.A. At the endB. By the endC. In the endD. At a

问题补充：

of this term, we will have learnt 4 books.

A. At the end

B. By the end

C. In the end

D. At an end

答案：

A. At the end

(答案→)B. By the end

C. In the end

D. At an end

解析：本题的含义是到这一个学期末端，我们将已经学完了4本书，by the end of表示到……末端的意思，通常用于将来完成时，故本题选B。