单项选择题

A．availability
B．tax
C．wastes
D．unavailability
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单项选择题
What is the total amount that the two advertisements will cost for one week
A．$5.
B．$15.
C．$30.
D．$250.
单项选择题
Flooding has ______.
A．destroyed many buildings
B．destroyed many cars
C．destroyed many villages
D．destroyed electric power lines and cut rail and road traffic
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