335.We always keep _______ spare paper,in case we ran out.
A.too much
B.a number of
C.plenty of
D.a good many
336.Green products are becoming more and more popular because they are environmentally _____.
A.friendly
B.various
C.common
D.changeable
335.答案是C；too much太多的…，修饰不可数名词或单独使用；a number of/a good many许多，大量，修饰可数名词；plenty of 丰富的，大量的，修饰可数与不可数名词。
336.答案是A;此题考查固定表达:be environmentally friendly 环保的。
