单项选择题

(While) (remembered) mainly (for the invention) of the telephone, Alexander Graham Bell devoted his life to (help) the deaf.

A．While
B．remembered
C．for the invention
D．help
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单项选择题
Workers newly (arrive) from the south (or) rural areas perform their job (differently) from those from (other sections) of the city.
A．arrive
B．or
C．differently
D．other sections
单项选择题
(After) her two-week vacation was (over), Dorothy regretted (to spend) so much money for (so little pleasure).
A．After
B．over
C．to spend
D．so little pleasure
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