---There is a book ________ on the ground.
---Let’s ________ and ask who lost it.
A.lies, pick it our
B.lying, pick it up
C.to lie, pick up
D.lying,pick out it
答案:B
题目分析:句意:---在地上有一本书,---让我们把它捡起来问问是谁丢的。There be +主语+doing+介词短语,表示某处有某物正做某事,lie的分词是把ie变y+ing, pick up捡起,拾起,如果是代词放在中间,结合语境可知选B。