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【題目】Some scientists believe that there is no _______ that the new medicine for cancer will be found. ( )
A. problem B. matter C. doubt D. question
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【題目】They have leading experts in this field, and that’s ______ they’ve made important progress.
A.where B.why C.whether D.who
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【題目】______ you should stop smoking is the biggest decision you have to make.
A.If B.Unless C.What D.Whether
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【題目】I prefer to stay at home _______ go to see a film. ( )
A. other than B. more than C. less than D. rather than
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