单项选择题

______ the passage of light, many new plastics are processed using technologies rivaling those used in the manufacture of computer chips.

A．For the better of
B．Permitting better
C．To better permit
D．It is better for
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单项选择题
A trap ______ disguise is what has come to be called a Trojan Horse, from the ancient story of the gift of the wooden horse from the Greeks.
A．offered as a gift in
B．offers a gift in
C．offering a gift to
D．offered a gift of
单项选择题
If the struggle for a sustainable society _____, we must have some vision of what we are aiming for.
A．is to succeed
B．has succeeded
C．succeeds
D．succeeded
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