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NL

The telegraph was (1) ______ in 1835 by Samuel Morse. The telegraph is an instrument (2) ______ sending messages between distance distant places by an electric current. To operate a (3) ______, you put a special key and then release it. This action closes and (4) ______ the electric circuit. The telegraph makes use of a special code, (5) ______ the Morse code. A message (6) ______ on a telegraph is called a telegraph (7) ______ the 1800s, the telegraph was extremely important until it was (8) ______ by the radio and the telephone.

1. A. invented B. improved C. invited D. discovered

2. A. from B. for C. on D. to

3. A. television B. telegram C. telegraph D. telephone

4. A. opened B. to open C. opening D. opens

5. A. call B. was called C. is called D. called

6. A. send B. received C. sent D. receives

7. A. On B. In C. From D. To

8. A. replaced B. retired C. repeated D. reread


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