阅读下面材料，在空格处填入适当的内容（1单词）或使用括号中单词的正确形式。
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 ________ (main)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 has 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 likely to________ ( find )a criminal online as you are Mr. or Miss Right.