More than a dozen students in that school abroad for further study every year.A. sentB. a

问题补充：

More than a dozen students in that school abroad for further study every year.

A. sent

B. are sent

C. have been sent

D. have sent

答案：

A. sent

(答案→)B. are sent

C. have been sent

D. have sent

解析：B

解析句意为：每年那所学校都有十多个学生被送到国外深造。more than a dozen十多个，谓语动词用复数；另外，句子的时间状语为every year，所以用一般现在时。