The factory （ ） we'll visit next week is not far from here.
（A）where
（B）to which
（C）which
（D）in which
The girl （ ） an English song in the next room is Tom's sister.
（A）who is singing
（B）is singing
（C）being written
（D）was singing
The book （ ） isn't in the library. 选项：
（A）what I need
（B）I need
（C）that I need it
（D）which I need it
