单项选择题

Poor transport facilities and the lack of resources, raw materials and energy also partly ______ the drop in contract fulfillment.

A．contributed to
B．attributed to
C．depended on
D．accounted for
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Every year, one student in our high school wins a scholarship that ______ one year of college.
A．improves
B．subsidizes
C．obliges
D．inflicts
单项选择题
He ______ his work to his colleagues before he went abroad.
A．transferred
B．commenced
C．delivered
D．commended
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