Question

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

Answer 1

答案A
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。