A、thEy wErE through with thE joB BEForE 6 o’CloCk.
B、thEy wErE 3 hours lAtE.
C、thE ComplEtion oF thE joB took morE timE thAn thEy hAD ExpECtED、
D、it wAs At 9:30 thAt thEy BEgAn to Do thE joB、