2. Early twentieth-century writers Ernst Hemingway and Edna St. Vincent Millay owed much of their public visibility to self-promotion: both were adept at ------ their own literary works.
A. marketing
B. modernizing
C. duplicating
D. finalizing
E. editing
解析：
空格对应冒号前的self-promotion“自我推销”，所以选择A选项marketing“营销”。
3. Chemistry professor Mande Holford learned about the National Science Foundation fellowship program in ------ way: she happened across an advertisement for it in a magazine she read during jury duty.
A. an orthodox
B. an anachronistic
C. a fortuitous
D. a dilatory
E. a nefarious
解析：
空格对应冒号后的描述，通过happen“碰巧发生”可以判断空格填C选项fortuitous“偶然的，意外的”。
词汇扩充：
偶然的，意外的：accidental, unintentional, haphazard, incidental, serendipity (n.)
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