问题
选择题
More than a dozen students in that school ______ abroad to study medicine last year. [ ]
A. sent
B. were sent
C. had sent
D. had been sent
答案
答案：B
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More than a dozen students in that school ______ abroad to study medicine last year. [ ]
A. sent
B. were sent
C. had sent
D. had been sent
答案：B
