单项选择题

in the meantime, the question facing the business is whether such research is ______ the costs.

A．worth
B．worth of
C．worthy
D．worthwhile
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单项选择题
David prefers ______.
A．to play football rather than staying with his wife
B．to play football rather than stay with his wife
C．playing football rather than stay with his wife
D．playing football rather than have stayed with his wife
单项选择题
in a recent science competition, the three students were awarded scholarships totaling ＄ 21,000.
A．Judged the best
B．Judging the best
C．To be judged the best
D．Having judged the best
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