Salesperson : Hi, can I help you?
Customer : Yes, please. ………….. are these socks?
Salesperson : They are very cheap! Only $5.
Yukarıdaki diyalogda boş bırakılan yere aşağıdaki hangi soru kökü getirilmelidir?

Kaynak: https://lolonolo.com/2021/08/07/ingilizce-1-vize-ve-final-sorulari-aof/