单项选择题

The purpose of a ______ is to cut down imports in order to protect domestic industry and workers from foreign competition.

A．tax
B．toll
C．fee
D．tariff
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单项选择题
If the profits in one year are not sufficient to pay the dividend, the ______ will be paid from the profits of later year.
A．arrear
B．debt
C．difference
D．margin
单项选择题
If you want to buy this house, the payment may be made in five ______.
A．installments
B．pieces
C．shares
D．parts
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