阅读理解。 The word 'Hello' may be used more often than any other word in the English language. Everyone in the USA and other countries uses this word. Thomas Edison is believed to be the first person to use 'Hello' on the telephone soon after the world's first telephone was invented. At first people began their words on the telephone with 'Are you there?' They were not sure if a telephone could really carry voices. Edison was a man with few words. He wanted to save time. The first time he picked up the phone, he was very busy. He trusted (信任) the telephone as he invented it himself. He was sure someone was there and only said 'Hello'. From then on, 'Hello' is often heard when you pick up the telephone. 1.'Hello' may be used _____. [     ] A. only in the USA B. only in England C. in many countries D. in English-speaking countries except the USA 2. From the passage we can learn that Edison _____. [     ] A. didn't like the word 'Hello' B. didn't know the word 'Hello' C. had nothing to do with the word 'Hello' D. might be the first one to use 'Hello' on the telephone 3. At first people said 'Are you there?' because _____. [     ] A. they didn't trust the telephone B. they didn't know each other C. they couldn't see each other D. they wanted to ask each other questions 4. Edison was a man of few words. It means _____. [     ] A. he knew few words B. He could say few words C. He didn't like to talk much D. He had few friends 5. Edison was sure someone was there because _____. [    ] A. he could see the person B. he knew the person C. he invented the telephone and trusted it D. he had just met the person