— You look tired.— Yes. I ___ non-stop until 8 o’clock.
#102862
A
had worked
B
work
C
have worked
D
was working
推荐题目
It was the first time that I ___________ the night face to face. 
#101477
A
had seen
B
have seen
C
see
D
seeing
Computer cannot remember who _______; it simply does what _______.
#104640
A
has used it; it is told
B
will used it; it was told
C
uses it; it has told
D
has used it; it told