1 dial                       a a small book with blank pages, used for writing messages
2 delay                    b a person who connects telephone calls to the right number
3 extension              c use the numbers on a telephone to make a call
4 prevent                 d put off to a later time
5 operator                e an inside number which connects an outside line with an office
6 pad                       f working well and without waste
7 efficient                 g keep from
8 convenient             h suitable

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