Many scientists say that it’s important for us to have food in our diet.A. a variety ofB.

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。