问题补充:
(·甘肃兰州名校高三检测)I have been living in the United States for 20 years, but seldom so lonely as now.
A. have I felt
B. I had felt
C. I have felt
D. had I felt
答案:
A. have I felt
B. I had felt
C. I have felt
D. had I felt
解析:A考查倒装和时态。句意:我在美国生活了,但是很少像现在这样感到如此孤独。否定词seldom置于句首,句子要用部分倒装,再根据前面的“have been living”可知此处应用现在完成时。故选A项。