___ march 10, they ceased to be husband and wife.
As to
B. As for
C. As of
D. As regards
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This failure of research motivated the _____of a new type of data.
A. invasion
B. introduction
C. incision
D. incubation
He decided to___ his gratitude for his friends into concrete actions.
A. transit
B. transfer
C. translate
D. transfuse
The statement was so _____l that it excluded all possible arguments.
A. ambiguous
B. obscure
C. subtle
D. unequivocal
He is so easily changing that we cannot accept any of his promises ____.
A. at great value
B. at fair value
C. at a face value
D. at retail value