问题
单项选择题
The sentence "pain seems to be a chronic human condition" means pain seems to ______.
A．be very serious
B．be very difficult
C．last for a long time
D．be always happening
答案
参考答案：D
解析：[分析] 词义题型。 chronic“慢性的，连续复发的，经常发生的”，因此D项为正确答案。