问题
选择题
After 15 years in the USA, he has finally decided to ____ American citizenship. [ ]
A. concentrate on
B. apply for
C. put off
D. appeal to
答案
答案：B
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After 15 years in the USA, he has finally decided to ____ American citizenship. [ ]
A. concentrate on
B. apply for
C. put off
D. appeal to
答案：B
