telephones
高二英语telephones
pipes too noisy! not clear! very clear electrical signals electrical signals conference calling A B C D E call waiting A B C A B B c redirection Find some words to plete the sentences: 1. If you
高三英语telephones
the receiving Early telephone about the wires? to make a call with a handle telephone? not popular (took a long time ) ─ buy,hire ─hear handle telephone →wind (electricity)→ operator→ connect,note