Directions: Using the given words to complete the following paragraph.(每题2分, 共10分) E-mail is a conversation that does not require an ____1____ response (like a telephone). If someone calls you ____2____ , you pick it up and the conversation begins. This is an ___3___ conversation. With e-mail, you send a message and then ____4____ a response. The response may come in five minutes or it may come in ___5____ . Either way, it’s not an interactive conversation. A. 1 B. 2 C. 3 D. 4 E. 5