Most companies’ marketing effort is focused on getting customers, with little attention _______ to keeping them.
—How dare(敢) you talk to your teacher like that? —Well, now I regret ______ that.
—What do you think of the book? —It’s ______ a book. It serves as (充当)a really good guide to job hunters.
The man ______ house I have stayed in for two months has some money trouble.
If you’re a poor driver, you should not_______ at night.
The snow is so deep. We can hardly get out of the house, ______?