单项选择题

A．When we are tired.
B．When we have a balanced diet.
C．When we can relax.
D．When we do regular exercise.
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单项选择题
A．Bean.B．Wheat.C．Rice.D．Corn.
A．Bean.
B．Wheat.
C．Rice.
D．Corn.
单项选择题
A．The engine of their boat stopped working.B．The motor of their boat broke.C．They ran out of oil.D．They lost the paddles (桨).
A．The engine of their boat stopped working.
B．The motor of their boat broke.
C．They ran out of oil.
D．They lost the paddles (桨).
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