Question

We should eat all kinds of food but never too much of _.

Answer 1

选A,B.

第一题,to much of it中的it是指代前面的food.

第二题,smelling sweet in the botanic garden 意思是闻起来很香,用来修饰flower,不能用to smell和smelt,因为该词组原始结构为Sth smells sweet,而不是Sth to smell sweet 或Sth is smelt sweet.