2. 外语
  3. Doctors believe that lung cancer is caused ______ by smoking too much.

Doctors believe that lung cancer is caused ______ by smoking too much.

admin2008-11-13  71
问题 Doctors believe that lung cancer is caused ______ by smoking too much.
选项 A、part
B、at part
C、in part
D、with part
答案C
解析
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