chi tiết giúp em với ạ Can you imagine (46) _____ life would be like if there were no telephone? You couldn’t call up your friends on the phone and talk to them. If fire (47) ______ out in your house, you couldn’t call the fire department. If someone were sick, you couldn’t call a doctor. (48) ________our daily life, we need to communicate with one another. We do this mostly by speaking to other people and listening to what they have to say to us, and when we are close to them, we can do it easily. (49) _______, our voices won’t travel very far even when we shout. The man (50) _____ had this possibility was Alexander Graham Bell, a Scotsman, born in Edinburg in 1847. Bell, a teacher of visible speech, who later moved to Canada, spent all his spare time experimenting. 46.A. when B. where C. what D. how 47.A. broke B. breaks C. had broken D. break 48.A. On B. In C. For D. With 49.A. So B. And C. Therefore D. However 50.A. who B. whom C. whose D. for whom