An early typewriter produced letters quickly and neatly; the typist, _____ couldn't see his work on his machine.

      A. however        B. therefore          C. yet          D. although

 A


解析:

however 然而。

本題譯文:早期的打字機打起字來又快又整齊, 然而打字員不能看著機器鍵盤打字。a

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