阅读下面短文，按照句子结构的语法性和上下文连贯的要求，在空格处填入一个适当的词或使用括号中词语的正确形式填空。
Nowadays, millions    lonely singles are now going online instead. _   World Wide Web is quickly becoming the world’s most popular matchmaker ( 媒人 ).
Singles are flocking (涌向) to the Internet  ___  ( largeness ) because their busy lifestyles leave them little time to look for a significant other. Using dating sites (约会网址) is quick and convenient. Many singles say the regular dating scene  ( just lead ) them from one bad experience to ___  and are ready to try something else. Dating sites also make  easy to avoid someone  __  you are not interested in. In the real world,   _  , ignoring someone you don’t like can be difficult.
Despite all the advantages, online dating also presents its own set of problems. People aren’t always those who they declare to be in their online  ____ ( describe ). Safety is another concern. You are just  __  ( like ) to find a criminal online as you are Mr. or Miss Right.