The boy had his pencil________.

问题描述:

The boy had his pencil________.
A.to sharpen B.sharpen C.sharpening D.sharpened
.说明为什么选这个,为什么不选那个.感激不尽!

D have sth done使某事被做.his pencil与sharpen(削尖)之间为被动关系,因此用过去分词作宾语补足语.