问题补充:
Many scientists say that it’s important for us to have food in our diet.
A. a variety of
B. a great deal
C. a large number of
D. a good many
答案:
(答案→)A. a variety of
B. a great deal
C. a large number of
D. a good many
解析:B和C后跟不可数名词,D跟可数名词复数, Food为集体名词。选A a variety of food 为各种各样的食物。