单选题：It was in such a good place ______ everyone wanted to go and..

Little ____ about his own safety, though he was in great danger himself. [ ]A. does he care B. did he care C. he cares D. he cared

It is not until midnight ______ he goes to bed every day.A．beforeB．whenC．sinceD．that

It was not until I was injured in a car accident ______ the real American society．A．that I found outB．when I found outC．did I find outD．that did I find out

(2013·北京东城区高三教学统一检测)In his speech, he said that it was his primary school teachers that he was fond of ________ influenced his whole life.A．whatB．whichC．asD．who

It isn't just big data specialists like data scientists and statisticians ______ to benefit from this boom of big data opportunities. A．who standsB．that standC．which standsD．when stand