The glass doors have taken the place of the wooden ones at the entrance,_____ in the natural light during the day.
_______ difficult and challenging the task may be, we must finish it on time, because there is a possibility _______our work will go down in history.
He bought a house,___________ the price is reasonable.
In the reading room, we found her ________ at a desk, with her attention ________ on a book.
All those second-hand cars are sold at before
What _______ pity that you must leave now! It is such _______ great fun to have dinner with you