单项选择题

One cannot be too careful, ______

A．can one
B．can he
C．can she
D．can they
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单项选择题
Water is an essential global resource and it is up to each of us to ______ it.
A．preserve
B．maintain
C．reserve
D．conserve
单项选择题
The Jerusalem municipality wants to ______ 88 homes in an Arab neighborhood of the city to make room for an archaeological park.
A．demolish
B．ruin
C．destroy
D．raze
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