Mike had prepared carefully for the exam, so that he could be sure of passing it on his first _______.
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.
That was the only gate _____ we could rush out and save those _____ were in great danger.