单项选择题

A．They reduce a person’s appetite.
B．They keep a person from being persistent in face of trouble.
C．They make a person’s nerve system weak.
D．They make a person more vulnerable m disease.
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单项选择题
A．She thinks the man should have helped earlier.B．She doesn’t need the man’s help.C．She doesn’t know the boxes are heavy.D．She wants the man to help with the boxes.
A．She thinks the man should have helped earlier.
B．She doesn’t need the man’s help.
C．She doesn’t know the boxes are heavy.
D．She wants the man to help with the boxes.
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