单项选择题

A．At speeds up to 15 knots.
B．At speeds up to 20 knots.
C．At speeds up to 12 knots.
D．At speeds up to 50 knots.
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单项选择题
A．She works at the meat counter.B．She puts groceries out on the shelves.C．She carries groceries out of the store for customers.D．She checks the quality of the dairy.
A．She works at the meat counter.
B．She puts groceries out on the shelves.
C．She carries groceries out of the store for customers.
D．She checks the quality of the dairy.
单项选择题
A．On foot.B．By car.C．By bus.D．By bik
A．On foot.
B．By car.
C．By bus.
D．By bik
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