—Where is our English teacher?—She is in the classroom, _____ the exercises _________ the students have done at home.
This is the house _______ I once lived
______ is the richest man in our city?
Xi’an was the last city ______ he visited in China.
The mountains lie near our hotel. There is a fine ________ of the mountains from our hotel window.
They want to make _____ clear to the public that they are doing an important and necessary job.