A、on Friday morning B、on Friday afternoon C、at dusk on Friday D、on Friday night C

US planes have bombed a suspected Taliban position in Eastern Afghanistan during a search for an American military unit that’s been missing since Tuesday. Reports suggest that 25 civilians were killed. A US military spokesman said the damage was being assessed but at this stage refused to say how many people had died. S. O. reports,
   "The attack on a suspected Taliban compound in Kunar province is reported to have been carried out at dusk on Friday,  A US military spokesman Jerry O’Hara said the bombing was conducted using precision-guided weapons on a target, which he described as ’intelligence driven’, He didn’t reveal how many people were killed. But Taliban assertions maintain as many as 25 civilians may have died in the bombing.
   The Afghan army has also carried out a raid on a hide-out in the central province of Uruzgan where about a hundred insurgents were believed to be hiding. The army said 20 Taliban guerillas had been killed."