When __________ you come here We __________ here last week.

Reading is the best way to kill time on the train.— _____________. I never go travelling without a book.

He is _____ an American as an applepie

To improve the quality of our products, we asked for suggestions ________ had used the products.[ ]

As PM2.5 readings reached as high as 900 in some cities, people are more _____ to get lung cancer in such conditions.