(单选题)

Jack decided to ______ for his grandpa.

A.draw a picture

B.build a new position

C.sing a song

D.buy a gift

参考答案：B

参考解析：

细节理解题。根据第三段第三句“He knew that his grandpa would no longer have the position on that card, so he decided to build a new one for his grandpa.”可知，杰克知道爷爷要退休了，没有工作了，所以要为爷爷设立一个新的岗位。故选B。

知识点：阅读理解四选一英语专业基础知识阅读理解教师招聘-小学英语