54.By five o’clock this evening ,the spaceship ________ eighty times round the earth .A .has traveled B .will have traveled C .has been traveling D .traveled

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54.Byfiveo’clockthisevening,thespaceship________eightytimesroundtheearth.A.hastraveledB.willhavetrav

54.By five o’clock this evening ,the spaceship ________ eighty times round the earth .A .has traveled B .will have traveled C .has been traveling D .traveled
54.By five o’clock this evening ,the spaceship ________ eighty times round the earth .
A .has traveled B .will have traveled C .has been traveling D .traveled

54.By five o’clock this evening ,the spaceship ________ eighty times round the earth .A .has traveled B .will have traveled C .has been traveling D .traveled
A .has traveled
By five o’clock this evening在之前已经完成,用完成时态

b