Beneath our feet ______ that our life depends on for food and clothing.

There used to be a mountain in our village, at the top of which ________.

—— He promised to come to see you. —— But he ＿＿＿＿＿. I’ve been all alone. 

Not until he walked into the classroom　　　that he left his dictionary at home.

On the table _____ two dictionaries．You may look up the word in either of them．