【题目】We are very proud of what our country ______ in the past seventy years.
A.has achievedB.is achievingC.achievedD.had achieved
在线课程【答案】A
【解析】
考查时态。句意：我们对祖国在过去70年里取得的成就感到骄傲。A. has achieved 已经实现；B. is achieving正在实现；C. achieved(去过)实现；D. had achieved(过去的过去)实现。由in the past seventy years(在过去的70年里)判断为现在完成时，故选A项。