单项选择题

A．He already knew about the problem.
B．There’’s nothing wrong with the washing machine.
C．Someone has started fixing the washing machine.
D．No one complained about the washing machine today.
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单项选择题
It has been found that vitamin E ________.
A．should be taken by patients regularly and persistently
B．can effectively reduce the recurrence of heart disease
C．has a preventive but not curative effect on heart disease
D．should be given to patients with heart disease as early as possible
单项选择题
A．It’’s too late to find a tutor.B．The man shouldn’’t hire the same tutor that she had.C．She isn’’t prepared for the midterm exam either.D．The man should hire a tutor before the midterm exam.
A．It’’s too late to find a tutor.
B．The man shouldn’’t hire the same tutor that she had.
C．She isn’’t prepared for the midterm exam either.
D．The man should hire a tutor before the midterm exam.
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