单项选择题

A．He has had thirteen decayed teeth.
B．He doesn’’t have a single decayed tooth.
C．He has fewer decayed teeth than other people of his age.
D．He never had a single tooth pulled out before he was fifty.
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单项选择题
A．He has nothing to do at that time.B．He just wants to have a break.C．He doesn’’t have math stuff.D．He gets a hundred on the last test.
A．He has nothing to do at that time.
B．He just wants to have a break.
C．He doesn’’t have math stuff.
D．He gets a hundred on the last test.
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