摘要：knows little
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Little Helen is very young, ________ she knows a lot of things．
- A.but
- B.as soon as
- C.so
- D.since
He knows little of mathematics, and _______ of chemistry.
[ ]
A. even more
B. still less
C. no less
D. still more
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B. still less
C. no less
D. still more