单项选择题

Public works projects have not significantly______ the unemployment situation.

A．facilitated
B．modulated
C．softened
D．alleviated
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单项选择题
After the robbery, the shop installed a sophisticated alarm system as an insurance______ further losses.
A．for
B．from
C．against
D．towards
单项选择题
People______ that vertical flight transports would carry millions of passengers as do the airliners of today.
A．comprehended
B．anticipated
C．revealed
D．asserted
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