问题补充:
An increasing number of students,year by year,across China hard to realize their dream of studying abroad.
A. try
B. have tried
C. will try
D. are trying
答案:
A. try
B. have tried
C. will try
(答案→)D. are trying
解析:考查动词时态。根据语境可知是很长时间内一直在重复进行的动作。