单项选择题

We have a high regard for Prof. Joseph because he always ______ his principles.

A．lives on
B．lives up to
C．lives through
D．lives with
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单项选择题
Everybody could see that the young man was ______ going abroad to study, whether his parents could afford the tuition or not.
A．lack of
B．intent on
C．deficient in
D．adequate for
单项选择题
Advertising media like direct mail, radio, television and newspapers ______ to increase the sales of industrial products.
A．have been used
B．will be used
C．is being used
D．has been used
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