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

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.

单项选择题(After) her two-week vacation was (over), Dorothy regretted (to spend) so much money for (so little pleasure).