Look at ____ desk A.Lucy and Lily B.Lucy's and Lily's C.Lucy and Lily's

问题描述:

Look at ____ desk A.Lucy and Lily B.Lucy's and Lily's C.Lucy and Lily's
说出为什么,

C
如为两人共有的,在第二人名后【's】如:
Tom and Jack's room
Mary and Jone's teacher