问题
选择题
In the past few months, the country _____ a further tightening of supply restrictions, making fuel and food supplies more difficult to obtain.
A．would witness
B．witnesses
C．has witnessed
D．had witnessed
答案
答案：C
题目分析：考查时态：句意：在过去几个月中，这个国家已经见证了进一步的供应限制，使得燃料和食物供应更难获得。因为时间是In the past few months，和现在完成时连用，所以选C。