These professional matchmaking firms usually demand that users ___(23)___ out a long questionnaire online and ___(24)___ tests that determine personality traits and values. They then sort through user information ___(25)___ on criteria like educational background, financial status, and physical features. With the help of the Internet and other “scientific” methods, they would recommend potential matches for clients who don’t have the time, the chance, or the courage for personal encounters. In fact, online matchmaking is becoming a booming industry around the world.　A survey ___ (26) ___ in 2006 by a leading website indicated that 53% of Internet users in Taiwan were single, and this figure means the country’s market for online dating services has huge potential.
【題組】23.
(A) fills
(B) fill
(C) have to fill
(D) have filled