单项选择题

A．On holiday.
B．On business.
C．The Great Lakes.
D．In the offic
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单项选择题
A．At a shoe store.B．At a bookstore.C．At the airport.D．At a gift shop.
A．At a shoe store.
B．At a bookstore.
C．At the airport.
D．At a gift shop.
单项选择题
A．They are very. rewarding.B．They are too time-consuming.C．They are not helpful at all.D．They are too troublesome.
A．They are very. rewarding.
B．They are too time-consuming.
C．They are not helpful at all.
D．They are too troublesome.
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