单项选择题

A．They work with precision.
B．They do physical exercises for us.
C．They work round the clock.
D．They free us from tedious and boring work
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单项选择题
A．The man is on his way to a gas station nearby.B．The man is driving and he has used up his gas.C．The man has lost his way because there is no gas station nearby.D．The man is waiting for another driver who will take him to a gas station nearby.
A．The man is on his way to a gas station nearby.
B．The man is driving and he has used up his gas.
C．The man has lost his way because there is no gas station nearby.
D．The man is waiting for another driver who will take him to a gas station nearby.
填空题
The intertwining of their lives benefits ___________________.
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