It was with the selfless help of our teacher ______ we realized our dream.
There are two small rooms in the house, _____ serves as a kitchen
This is the very knife _____ I used to cut apples yesterday.
---- Is it high time that we _____ on the school building? ---- Yes, it _____.
The cost of sales makes up a large part of the prices that _____.
The captain stood by the window, _____ he could see the top of the tower.