单项选择题

Who had gasmasks

A．Everybody.
B．A part of the protestors.
C．Policemen.
D．Both B and Ｃ.
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单项选择题
With whom were the jails and courts overloaded
A．With prisoners.
B．With arrested demonstrators.
C．With criminals.
D．With protestors.
单项选择题
Which one of the following is NOT true for the reason why people prefer to buy wood-burning stoves
A．The initial cost is very low.
B．The fuel costs are cheaper.
C．Wood fires are more efficient, cleaner, and safer than ever before.
D．The wood-burning stoves are more efficient than gas or oil ones.
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