问题补充：
people gather there, talking about the film about Comrade Lei Feng.
A. A great deal of
B. The large amount of
C. The number of
D. A great many
答案：
A. A great deal of
B. The large amount of
C. The number of
(答案→)D. A great many
解析：a great deal of修饰不可数名词+单数谓语; large amount of修饰不可数名词+复数谓语; the number of /the amount of+名词+单数谓语; a great many修饰可数名词+复数谓语.
