问题补充：
work has been done to improve the people’s living standard.
A. A large amount of
B. A large number of
C. A great deal
D. A great many
答案：
(答案→)A. A large amount of
B. A large number of
C. A great deal
D. A great many
解析：考查短语辨析。A large amount of修饰不可数名词；A large number of和A great many修饰可数名词的复数；A great deal缺少介词of。Work不可数，用A large amount of。故选A。
