—You look tired.  —Yes. I _____ non-stop until twelve o’clock.   
#103911
A
hasn’t been working
B
wasn’t working
C
was working
D
didn’t work
推荐题目
— Look! Somebody _____the sofa.— Well, it wasn't me. I didn't do it.
#100461
A
is cleaning
B
was cleaning
C
has cleaned
D
had cleaned
--Why has he been staying at home these days?  --He ___________ since a month ago.
#104803
A
has been out of work
B
was out of work
C
has lost his work
D
had left from his work
The fire was finally brought under control, but extensive damage _________. 
#99352
A
is caused
B
was causing
C
had caused
D
had been caused
He _____ football regularly for many years when he was young.
#100315
A
was playing
B
has played
C
played
D
had played