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
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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