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单项选择题

One way to understand thousands of new words in gain ______ good knowledge of basic word formation．

A．/
B．the
C．a
D．one
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单项选择题It is often said that ______ teachers have ______ very easy life.

A. /;/
B. /;a
C. the;/
D. the; a

单项选择题On May 5, 2005,at ______ World Table Tennis Championship ,Kong Ling hui and Wang Hao won the gold medal in men's with ______ score of 4:1.

A. a ; a
B. / the
C. a ; /
D. the ; a