Detailed Instructions: You are given an English sentence with a blank, and you need to predict the missing word. After completing, the whole sentence should be gramatically correct and non-ambiguous.
Problem:or would have been cheerful if it had not been so painfully clean as to give it something of the appearance of an unused parlor its windows looked east and west through the west one looking out on the back yard came a flood of mellow june sunlight but the east ____
Solution:
one