※ 밑줄 친 부분에 들어갈 말로 가장 적절한 것을 고르시오. [문 17.～문 18.] Developments in communications technology have changed the ways in which we communicate. The wide use of the fax machine in the last 30 years has contributed to the decline in sending messages by foot or bicycle. ______________, the use of the Internet is lessening the demand for messenger services. Nevertheless, the need to deliver important packages quickly, especially between businesses, has remained steady.