Ex1: Choose the word or phrase among A, B, C or D that best fits the blank space in the following passage. E-mail and chat room let children communicate (1) friends and family members. They can also allow children to connect with people that they have never (2) in person. Knowing a little about each of these communication services can help parents (3) children safer while online. Through e-mail, (4) can easily send and recive messages. These messages may also have text, audio, and picture file attached. Signining up for an e-mail account is simple (5) most services offer them for free. Sometimes these messages contain viruses,or other inappropriate content, so parents should warn children to be wary of e-mails from (6) people. Chat rooms are online hang-out spots where anyone can talk about (7) - cultural events, books, and other common interests. User often do not know each other in real life, so it is important that parents keep a close eye on the content of any (8) . 1. A. to B. with C. for D. through 2. A. met B. gone C. asked D. called 3. A. save B. protect C. surround D. keep 4. A. receivers B. messengers C. users D. partners 5. A. due to B. because C. because of D. so 6. A. know B. well-know C. unknow D. unpopular 7.A. every B.something C.nothing D. anything 8. A. conversations B. meetings C. letters D. users