问题补充:
of the students who took part in the military training is 750.
A. A number
B. A lot
C. Dozens
D. The number
答案:
A. A number
B. A lot
C. Dozens
(答案→)D. The number
解析:考查主谓一致:ABC三个选项都可以接of,表示许多,但如果选它们,后面的谓语应该是复数,而这句话的谓语是单数,用the number of…,“…的数量”后面的谓语是单数,句意:参加军事训练的学生的数量是750.选D。