单项选择题

The Eco Trust has been a vocal advocate of environmental issues ______ its establishment in 1976.

A. for
B. from
C. since
D. as

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单项选择题

This special offer is available ______ to members of the Trent Market club.

A. allegedly
B. enthusiastically
C. possibly
D. exclusively

单项选择题

We finally received the fax ______ Monday, which was three days later than we expected.

A. on
B. in
C. as
D. at

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