—Do you know the most ancient city in China—Xi’an well?—No,this is the first time I ________ here.
_____ seen smoking here will be fined.
Her pronunciation is as good as, if ____than, her teacher's.
Each of the students, hoping to pass the exam, _____the book.
They kept trying _____ they must have known it was hopeless.
——What should I wear to attend his wedding party? ——Dress ____ you like.