问题
选择题
Though most people know that smoking __________ the risk of cancer, it is still hard for them to give it
up. [ ]
A. multiplies
B. adds
C. combines
D. gains
答案
答案：A
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Though most people know that smoking __________ the risk of cancer, it is still hard for them to give it
up. [ ]
A. multiplies
B. adds
C. combines
D. gains
答案：A