问题补充:
An early typewriter produced letters quickly and neatly; the typist, couldn see his work on his machine.
A. however
B. therefore
C. yet
D. although
答案:
A. however
B. therefore
C. yet
D. although
解析:
however 然而。
本题译文:早期的打字机打起字来又快又整齐, 然而打字员不能看着机器键盘打字。a