It is dark, but he is ______ in the office.

It is dark, but he is ______ in the office.
A、already
B、yet
C、still
D、also
【正确答案】：C
【题目解析】：already 已经；yet 还（一般用于否定句，疑问句中）；still 仍然；also 也；句意：虽然天已经黑了，但他____在办公室里。因此C符合题意，仍然在办公室。