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
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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
单项选择题
He has______ strange hobbies like collecting bottle tops and inventing secret codes.
A．gone on
B．gone in for
C．gone with
D．gone through with
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