问题补充:
单选题Manyscientistssaythatit’simportantforustohave______foodinourdiet.A.a variety ofB.a great dealC.a large number ofD.a good many
答案:
A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。
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